diff --git a/schema/catvrs-source.yaml b/schema/catvrs-source.yaml
index 36ad7f1..72b6d46 100644
--- a/schema/catvrs-source.yaml
+++ b/schema/catvrs-source.yaml
@@ -43,7 +43,7 @@ $defs:
             - $refCurie: gks.core:IRI
 
   ProteinSequenceConsequence:
-    maturity: Alpha
+    maturity: draft
     type: object
     inherits: CategoricalVariation
     description: >-
@@ -70,7 +70,7 @@ $defs:
       - definingContext
 
   CanonicalAllele:
-    maturity: Alpha
+    maturity: draft
     inherits: CategoricalVariation
     description: >-
       A canonical allele is defined by an `Allele <https://vrs.ga4gh.org/en/2.0/terms_and_model.html#variation>` 
@@ -95,7 +95,7 @@ $defs:
       - definingContext
 
   CategoricalCnv:
-    maturity: Alpha
+    maturity: draft
     type: object
     inherits: CategoricalVariation
     description: >-
@@ -146,7 +146,7 @@ $defs:
       - location
 
   DescribedVariation:
-    maturity: Alpha
+    maturity: draft
     type: object
     inherits: CategoricalVariation
     description: >-
diff --git a/schema/catvrs.json b/schema/catvrs.json
index 79ea460..b24645f 100644
--- a/schema/catvrs.json
+++ b/schema/catvrs.json
@@ -21,7 +21,7 @@
          ]
       },
       "ProteinSequenceConsequence": {
-         "maturity": "Alpha",
+         "maturity": "draft",
          "type": "object",
          "description": "A change that occurs in a protein sequence as a result of genomic changes. Due to the degenerate nature of the genetic code, there are often several genomic changes that can cause a protein sequence consequence. The protein sequence consequence, like a CanonicalAllele, is defined by an `Allele <https://vrs.ga4gh.org/en/2.0/terms_and_model.html#variation>` that is representative of a collection of congruent Protein Alleles that share the same altered codon(s).",
          "properties": {
@@ -99,7 +99,7 @@
          "additionalProperties": false
       },
       "CanonicalAllele": {
-         "maturity": "Alpha",
+         "maturity": "draft",
          "description": "A canonical allele is defined by an `Allele <https://vrs.ga4gh.org/en/2.0/terms_and_model.html#variation>`  that is representative of a collection of congruent Alleles, each of which depict the same nucleic acid  change on different underlying reference sequences. Congruent representations of an Allele often exist across different genome assemblies and associated cDNA transcript representations.",
          "type": "object",
          "properties": {
@@ -177,7 +177,7 @@
          "additionalProperties": false
       },
       "CategoricalCnv": {
-         "maturity": "Alpha",
+         "maturity": "draft",
          "type": "object",
          "description": "A categorical variation domain is defined first by a sequence derived from a canonical [Location ](https://vrs.ga4gh.org/en/2.0/terms_and_model.html#Location) , which is representative of  a collection of congruent Locations. The change or count of this sequence is also described, either by a numeric value (e.g. \"3 or more copies\") or categorical representation (e.g. \"high-level gain\").  Categorical CNVs may optionally be defined by rules specifying the location match characteristics for  member CNVs.",
          "properties": {
@@ -285,7 +285,7 @@
          "additionalProperties": false
       },
       "DescribedVariation": {
-         "maturity": "Alpha",
+         "maturity": "draft",
          "type": "object",
          "description": "Some categorical variation concepts are supported by custom nomenclatures or text-descriptive representations for which a categorical variation model does not exist. DescribedVariation is a class that adds requirements and contextual semantics to the `label` and `description` fields to indicate how a categorical variation concept should be evaluated for matching variants.",
          "properties": {
diff --git a/schema/catvrs.yaml b/schema/catvrs.yaml
index c7e7c37..f391455 100644
--- a/schema/catvrs.yaml
+++ b/schema/catvrs.yaml
@@ -11,7 +11,7 @@ $defs:
     - $ref: '#/$defs/DescribedVariation'
     - $ref: '#/$defs/ProteinSequenceConsequence'
   ProteinSequenceConsequence:
-    maturity: Alpha
+    maturity: draft
     type: object
     description: A change that occurs in a protein sequence as a result of genomic
       changes. Due to the degenerate nature of the genetic code, there are often several
@@ -74,7 +74,7 @@ $defs:
     - type
     additionalProperties: false
   CanonicalAllele:
-    maturity: Alpha
+    maturity: draft
     description: A canonical allele is defined by an `Allele <https://vrs.ga4gh.org/en/2.0/terms_and_model.html#variation>`  that
       is representative of a collection of congruent Alleles, each of which depict
       the same nucleic acid  change on different underlying reference sequences. Congruent
@@ -135,7 +135,7 @@ $defs:
     - type
     additionalProperties: false
   CategoricalCnv:
-    maturity: Alpha
+    maturity: draft
     type: object
     description: A categorical variation domain is defined first by a sequence derived
       from a canonical [Location ](https://vrs.ga4gh.org/en/2.0/terms_and_model.html#Location)
@@ -234,7 +234,7 @@ $defs:
     - type
     additionalProperties: false
   DescribedVariation:
-    maturity: Alpha
+    maturity: draft
     type: object
     description: Some categorical variation concepts are supported by custom nomenclatures
       or text-descriptive representations for which a categorical variation model
diff --git a/schema/merged.json b/schema/merged.json
index c2bb392..0b0d565 100644
--- a/schema/merged.json
+++ b/schema/merged.json
@@ -21,7 +21,7 @@
          ]
       },
       "ProteinSequenceConsequence": {
-         "maturity": "Alpha",
+         "maturity": "draft",
          "type": "object",
          "description": "A change that occurs in a protein sequence as a result of genomic changes. Due to the degenerate nature of the genetic code, there are often several genomic changes that can cause a protein sequence consequence. The protein sequence consequence, like a CanonicalAllele, is defined by an `Allele <https://vrs.ga4gh.org/en/2.0/terms_and_model.html#variation>` that is representative of a collection of congruent Protein Alleles that share the same altered codon(s).",
          "properties": {
@@ -83,9 +83,6 @@
                      {
                         "$ref": "#/$defs/CopyNumberCount"
                      },
-                     {
-                        "$ref": "#/$defs/Genotype"
-                     },
                      {
                         "$ref": "#/$defs/Haplotype"
                      },
@@ -114,7 +111,7 @@
          "additionalProperties": false
       },
       "CanonicalAllele": {
-         "maturity": "Alpha",
+         "maturity": "draft",
          "description": "A canonical allele is defined by an `Allele <https://vrs.ga4gh.org/en/2.0/terms_and_model.html#variation>`  that is representative of a collection of congruent Alleles, each of which depict the same nucleic acid  change on different underlying reference sequences. Congruent representations of an Allele often exist across different genome assemblies and associated cDNA transcript representations.",
          "type": "object",
          "properties": {
@@ -176,9 +173,6 @@
                      {
                         "$ref": "#/$defs/CopyNumberCount"
                      },
-                     {
-                        "$ref": "#/$defs/Genotype"
-                     },
                      {
                         "$ref": "#/$defs/Haplotype"
                      },
@@ -207,7 +201,7 @@
          "additionalProperties": false
       },
       "CategoricalCnv": {
-         "maturity": "Alpha",
+         "maturity": "draft",
          "type": "object",
          "description": "A categorical variation domain is defined first by a sequence derived from a canonical [Location ](https://vrs.ga4gh.org/en/2.0/terms_and_model.html#Location) , which is representative of  a collection of congruent Locations. The change or count of this sequence is also described, either by a numeric value (e.g. \"3 or more copies\") or categorical representation (e.g. \"high-level gain\").  Categorical CNVs may optionally be defined by rules specifying the location match characteristics for  member CNVs.",
          "properties": {
@@ -269,9 +263,6 @@
                      {
                         "$ref": "#/$defs/CopyNumberCount"
                      },
-                     {
-                        "$ref": "#/$defs/Genotype"
-                     },
                      {
                         "$ref": "#/$defs/Haplotype"
                      },
@@ -330,7 +321,7 @@
          "additionalProperties": false
       },
       "DescribedVariation": {
-         "maturity": "Alpha",
+         "maturity": "draft",
          "type": "object",
          "description": "Some categorical variation concepts are supported by custom nomenclatures or text-descriptive representations for which a categorical variation model does not exist. DescribedVariation is a class that adds requirements and contextual semantics to the `label` and `description` fields to indicate how a categorical variation concept should be evaluated for matching variants.",
          "properties": {
@@ -384,9 +375,6 @@
                      {
                         "$ref": "#/$defs/CopyNumberCount"
                      },
-                     {
-                        "$ref": "#/$defs/Genotype"
-                     },
                      {
                         "$ref": "#/$defs/Haplotype"
                      },
@@ -413,7 +401,7 @@
       },
       "Coding": {
          "type": "object",
-         "maturity": "Alpha",
+         "maturity": "draft",
          "description": "a concept codified by a terminology system.",
          "properties": {
             "label": {
@@ -441,7 +429,7 @@
       },
       "Mapping": {
          "type": "object",
-         "maturity": "Alpha",
+         "maturity": "draft",
          "description": "A mapping to a concept in a terminology system.",
          "properties": {
             "id": {
@@ -486,7 +474,7 @@
       },
       "Extension": {
          "type": "object",
-         "maturity": "Alpha",
+         "maturity": "draft",
          "description": "The Extension class provides VODs with a means to extend descriptions with other attributes unique to a content provider. These extensions are not expected to be natively understood under VRSATILE, but may be used for pre-negotiated exchange of message attributes when needed.",
          "properties": {
             "type": {
@@ -516,14 +504,14 @@
          "additionalProperties": false
       },
       "Code": {
-         "maturity": "Alpha",
+         "maturity": "draft",
          "description": "Indicates that the value is taken from a set of controlled strings defined elsewhere. Technically, a code is restricted to a string which has at least one character and no leading or  trailing whitespace, and where there is no whitespace other than single spaces in the contents.",
          "type": "string",
          "pattern": "\\S+( \\S+)*",
          "example": "ENSG00000139618"
       },
       "IRI": {
-         "maturity": "Alpha",
+         "maturity": "draft",
          "description": "An IRI Reference (either an IRI or a relative-reference), according to `RFC3986 section 4.1  <https://datatracker.ietf.org/doc/html/rfc3986#section-4.1>` and `RFC3987 section 2.1 <https://datatracker.ietf.org/doc/html/rfc3987#section-2.1>`. MAY be a JSON Pointer as an IRI fragment, as  described by `RFC6901 section 6 <https://datatracker.ietf.org/doc/html/rfc6901#section-6>`.",
          "type": "string",
          "format": "iri-reference"
@@ -544,7 +532,7 @@
       },
       "TraitSet": {
          "type": "object",
-         "maturity": "Alpha",
+         "maturity": "draft",
          "description": "A set of phenotype and/or disease concepts that together constitute a condition.",
          "properties": {
             "id": {
@@ -611,7 +599,7 @@
       },
       "Disease": {
          "type": "object",
-         "maturity": "Alpha",
+         "maturity": "draft",
          "description": "A particular abnormal condition that negatively affects the structure or function  of all or part of an organism and is not immediately due to any external injury.",
          "properties": {
             "id": {
@@ -662,7 +650,7 @@
       },
       "Phenotype": {
          "type": "object",
-         "maturity": "Alpha",
+         "maturity": "draft",
          "description": "An observable characteristic or trait of an organism.",
          "properties": {
             "id": {
@@ -730,7 +718,7 @@
       },
       "TherapeuticAction": {
          "type": "object",
-         "maturity": "Alpha",
+         "maturity": "draft",
          "description": "A therapeutic action taken that is intended to alter or stop a pathologic process.",
          "properties": {
             "id": {
@@ -781,7 +769,7 @@
       },
       "TherapeuticAgent": {
          "type": "object",
-         "maturity": "Alpha",
+         "maturity": "draft",
          "description": "An administered therapeutic agent that is intended to alter or stop a pathologic process.",
          "properties": {
             "id": {
@@ -832,7 +820,7 @@
       },
       "CombinationTherapy": {
          "type": "object",
-         "maturity": "Alpha",
+         "maturity": "draft",
          "description": "A therapeutic procedure that involves multiple different therapeutic procedures  performed in combination.",
          "properties": {
             "id": {
@@ -903,7 +891,7 @@
       },
       "TherapeuticSubstituteGroup": {
          "type": "object",
-         "maturity": "Alpha",
+         "maturity": "draft",
          "description": "A group of therapeutic procedures that may be treated as substitutes for one another.",
          "properties": {
             "id": {
@@ -970,7 +958,7 @@
          "additionalProperties": false
       },
       "Gene": {
-         "maturity": "Alpha",
+         "maturity": "draft",
          "description": "A basic physical and functional unit of heredity.",
          "type": "object",
          "properties": {
@@ -1035,9 +1023,6 @@
             {
                "$ref": "#/$defs/CopyNumberCount"
             },
-            {
-               "$ref": "#/$defs/Genotype"
-            },
             {
                "$ref": "#/$defs/Haplotype"
             }
@@ -1049,7 +1034,7 @@
       "Expression": {
          "type": "object",
          "privateTo": "Variation",
-         "maturity": "Alpha",
+         "maturity": "draft",
          "description": "Representation of a variation by a specified nomenclature or syntax for a Variation object.  Common examples of expressions for the description of molecular variation include the HGVS  and ISCN nomenclatures.",
          "properties": {
             "syntax": {
@@ -1101,9 +1086,6 @@
             },
             {
                "$ref": "#/$defs/CopyNumberCount"
-            },
-            {
-               "$ref": "#/$defs/Genotype"
             }
          ],
          "discriminator": {
@@ -1111,7 +1093,7 @@
          }
       },
       "Allele": {
-         "maturity": "Alpha",
+         "maturity": "draft",
          "ga4ghDigest": {
             "prefix": "VA",
             "keys": [
@@ -1142,17 +1124,17 @@
                   "$ref": "#/$defs/Extension"
                }
             },
-            "digest": {
-               "description": "A sha512t24u digest created using the VRS Computed Identifier algorithm.",
-               "type": "string",
-               "pattern": "[0-9A-Za-z_\\-]{32}"
-            },
             "type": {
                "type": "string",
                "const": "Allele",
                "default": "Allele",
                "description": "MUST be \"Allele\""
             },
+            "digest": {
+               "description": "A sha512t24u digest created using the VRS Computed Identifier algorithm.",
+               "type": "string",
+               "pattern": "^[0-9A-Za-z_\\-]{32}$"
+            },
             "expressions": {
                "type": "array",
                "ordered": false,
@@ -1193,7 +1175,7 @@
          "additionalProperties": false
       },
       "Haplotype": {
-         "maturity": "Alpha",
+         "maturity": "draft",
          "ga4ghDigest": {
             "prefix": "HT",
             "keys": [
@@ -1223,17 +1205,17 @@
                   "$ref": "#/$defs/Extension"
                }
             },
-            "digest": {
-               "description": "A sha512t24u digest created using the VRS Computed Identifier algorithm.",
-               "type": "string",
-               "pattern": "[0-9A-Za-z_\\-]{32}"
-            },
             "type": {
                "type": "string",
                "const": "Haplotype",
                "default": "Haplotype",
                "description": "MUST be \"Haplotype\""
             },
+            "digest": {
+               "description": "A sha512t24u digest created using the VRS Computed Identifier algorithm.",
+               "type": "string",
+               "pattern": "^[0-9A-Za-z_\\-]{32}$"
+            },
             "expressions": {
                "type": "array",
                "ordered": false,
@@ -1259,7 +1241,7 @@
                      }
                   ]
                },
-               "description": "A list of Alleles that comprise a Haplotype.  Members must share the same reference sequence as adjacent members. Alleles should not have overlapping or adjacent coordinates with neighboring Alleles. Neighboring alleles should be ordered  by ascending coordinates, unless represented on a DNA inversion (following an end-defined sequence  terminal), in which case they should be ordered in descending coordinates. Sequence references MUST be consistent for all members between and including the end of one Adjacency and the beginning of  another."
+               "description": "A list of Alleles that comprise a Haplotype.  Members must share the same reference sequence as adjacent members. Alleles should not have overlapping or adjacent coordinates with neighboring Alleles. Neighboring alleles should be ordered  by ascending coordinates, unless represented on a DNA inversion (following an Adjacency with  end-defined adjoinedSequences), in which case they should be ordered in descending coordinates.  Sequence references MUST be consistent for all members between and including the end of one  Adjacency and the beginning of another."
             }
          },
          "required": [
@@ -1268,7 +1250,7 @@
          "additionalProperties": false
       },
       "CopyNumberCount": {
-         "maturity": "Alpha",
+         "maturity": "draft",
          "ga4ghDigest": {
             "keys": [
                "copies",
@@ -1299,17 +1281,17 @@
                   "$ref": "#/$defs/Extension"
                }
             },
-            "digest": {
-               "description": "A sha512t24u digest created using the VRS Computed Identifier algorithm.",
-               "type": "string",
-               "pattern": "[0-9A-Za-z_\\-]{32}"
-            },
             "type": {
                "type": "string",
                "const": "CopyNumberCount",
                "default": "CopyNumberCount",
                "description": "MUST be \"CopyNumberCount\""
             },
+            "digest": {
+               "description": "A sha512t24u digest created using the VRS Computed Identifier algorithm.",
+               "type": "string",
+               "pattern": "^[0-9A-Za-z_\\-]{32}$"
+            },
             "expressions": {
                "type": "array",
                "ordered": false,
@@ -1347,7 +1329,7 @@
          "additionalProperties": false
       },
       "CopyNumberChange": {
-         "maturity": "Alpha",
+         "maturity": "draft",
          "ga4ghDigest": {
             "keys": [
                "copyChange",
@@ -1378,17 +1360,17 @@
                   "$ref": "#/$defs/Extension"
                }
             },
-            "digest": {
-               "description": "A sha512t24u digest created using the VRS Computed Identifier algorithm.",
-               "type": "string",
-               "pattern": "[0-9A-Za-z_\\-]{32}"
-            },
             "type": {
                "type": "string",
                "const": "CopyNumberChange",
                "default": "CopyNumberChange",
                "description": "MUST be \"CopyNumberChange\""
             },
+            "digest": {
+               "description": "A sha512t24u digest created using the VRS Computed Identifier algorithm.",
+               "type": "string",
+               "pattern": "^[0-9A-Za-z_\\-]{32}$"
+            },
             "expressions": {
                "type": "array",
                "ordered": false,
@@ -1428,86 +1410,8 @@
          ],
          "additionalProperties": false
       },
-      "Genotype": {
-         "maturity": "Alpha",
-         "ga4ghDigest": {
-            "keys": [
-               "count",
-               "members",
-               "type"
-            ],
-            "prefix": "GT"
-         },
-         "description": "A quantified set of _in-trans_ MolecularVariation at a genomic locus.",
-         "type": "object",
-         "properties": {
-            "id": {
-               "type": "string",
-               "description": "The 'logical' identifier of the entity in the system of record, e.g. a UUID. This 'id' is  unique within a given system. The identified entity may have a different 'id' in a different  system, or may refer to an 'id' for the shared concept in another system (e.g. a CURIE)."
-            },
-            "label": {
-               "type": "string",
-               "description": "A primary label for the entity."
-            },
-            "description": {
-               "type": "string",
-               "description": "A free-text description of the entity."
-            },
-            "extensions": {
-               "type": "array",
-               "ordered": true,
-               "items": {
-                  "$ref": "#/$defs/Extension"
-               }
-            },
-            "digest": {
-               "description": "A sha512t24u digest created using the VRS Computed Identifier algorithm.",
-               "type": "string",
-               "pattern": "[0-9A-Za-z_\\-]{32}"
-            },
-            "type": {
-               "type": "string",
-               "const": "Genotype",
-               "default": "Genotype",
-               "description": "MUST be \"Genotype\""
-            },
-            "expressions": {
-               "type": "array",
-               "ordered": false,
-               "items": {
-                  "$ref": "#/$defs/Expression"
-               }
-            },
-            "members": {
-               "type": "array",
-               "ordered": false,
-               "uniqueItems": true,
-               "minItems": 1,
-               "items": {
-                  "$ref": "#/$defs/GenotypeMember"
-               },
-               "description": "Each GenotypeMember in `members` describes a MolecularVariation and the count of that variation at the locus."
-            },
-            "count": {
-               "oneOf": [
-                  {
-                     "$ref": "#/$defs/Range"
-                  },
-                  {
-                     "type": "integer"
-                  }
-               ],
-               "description": "The total number of copies of all MolecularVariation at this locus, MUST be greater than or equal to the sum of GenotypeMember copy counts. If greater than the total counts, this implies additional MolecularVariation that are expected to exist but are not explicitly indicated."
-            }
-         },
-         "required": [
-            "count",
-            "members"
-         ],
-         "additionalProperties": false
-      },
       "SequenceLocation": {
-         "maturity": "Alpha",
+         "maturity": "draft",
          "ga4ghDigest": {
             "keys": [
                "end",
@@ -1539,17 +1443,17 @@
                   "$ref": "#/$defs/Extension"
                }
             },
-            "digest": {
-               "description": "A sha512t24u digest created using the VRS Computed Identifier algorithm.",
-               "type": "string",
-               "pattern": "[0-9A-Za-z_\\-]{32}"
-            },
             "type": {
                "type": "string",
                "const": "SequenceLocation",
                "default": "SequenceLocation",
                "description": "MUST be \"SequenceLocation\""
             },
+            "digest": {
+               "description": "A sha512t24u digest created using the VRS Computed Identifier algorithm.",
+               "type": "string",
+               "pattern": "^[0-9A-Za-z_\\-]{32}$"
+            },
             "sequenceReference": {
                "oneOf": [
                   {
@@ -1588,7 +1492,7 @@
          "additionalProperties": false
       },
       "SequenceReference": {
-         "maturity": "Alpha",
+         "maturity": "draft",
          "ga4ghDigest": {
             "assigned": true
          },
@@ -1614,11 +1518,6 @@
                   "$ref": "#/$defs/Extension"
                }
             },
-            "digest": {
-               "description": "A sha512t24u digest created using the VRS Computed Identifier algorithm.",
-               "type": "string",
-               "pattern": "[0-9A-Za-z_\\-]{32}"
-            },
             "type": {
                "type": "string",
                "const": "SequenceReference"
@@ -1626,7 +1525,7 @@
             "refgetAccession": {
                "description": "A `GA4GH RefGet <http://samtools.github.io/hts-specs/refget.html>` identifier for the referenced sequence,  using the sha512t24u digest.",
                "type": "string",
-               "pattern": "SQ.[0-9A-Za-z_\\-]{32}"
+               "pattern": "^SQ.[0-9A-Za-z_\\-]{32}$"
             },
             "residueAlphabet": {
                "type": "string",
@@ -1657,7 +1556,7 @@
          }
       },
       "ReferenceLengthExpression": {
-         "maturity": "Alpha",
+         "maturity": "draft",
          "ga4ghDigest": {
             "keys": [
                "length",
@@ -1687,11 +1586,6 @@
                   "$ref": "#/$defs/Extension"
                }
             },
-            "digest": {
-               "description": "A sha512t24u digest created using the VRS Computed Identifier algorithm.",
-               "type": "string",
-               "pattern": "[0-9A-Za-z_\\-]{32}"
-            },
             "type": {
                "type": "string",
                "const": "ReferenceLengthExpression",
@@ -1726,7 +1620,7 @@
          "additionalProperties": false
       },
       "LengthExpression": {
-         "maturity": "Alpha",
+         "maturity": "draft",
          "ga4ghDigest": {
             "keys": [
                "length",
@@ -1755,11 +1649,6 @@
                   "$ref": "#/$defs/Extension"
                }
             },
-            "digest": {
-               "description": "A sha512t24u digest created using the VRS Computed Identifier algorithm.",
-               "type": "string",
-               "pattern": "[0-9A-Za-z_\\-]{32}"
-            },
             "type": {
                "type": "string",
                "const": "LengthExpression",
@@ -1783,7 +1672,7 @@
          "additionalProperties": false
       },
       "LiteralSequenceExpression": {
-         "maturity": "Alpha",
+         "maturity": "draft",
          "ga4ghDigest": {
             "keys": [
                "sequence",
@@ -1812,11 +1701,6 @@
                   "$ref": "#/$defs/Extension"
                }
             },
-            "digest": {
-               "description": "A sha512t24u digest created using the VRS Computed Identifier algorithm.",
-               "type": "string",
-               "pattern": "[0-9A-Za-z_\\-]{32}"
-            },
             "type": {
                "type": "string",
                "const": "LiteralSequenceExpression",
@@ -1834,72 +1718,8 @@
          ],
          "additionalProperties": false
       },
-      "GenotypeMember": {
-         "privateTo": "Genotype",
-         "ga4ghDigest": {
-            "keys": [
-               "count",
-               "variation"
-            ]
-         },
-         "description": "A class for expressing the count of a specific MolecularVariation present _in-trans_ at a genomic locus represented by a Genotype.",
-         "type": "object",
-         "properties": {
-            "id": {
-               "type": "string",
-               "description": "The 'logical' identifier of the entity in the system of record, e.g. a UUID. This 'id' is  unique within a given system. The identified entity may have a different 'id' in a different  system, or may refer to an 'id' for the shared concept in another system (e.g. a CURIE)."
-            },
-            "label": {
-               "type": "string",
-               "description": "A primary label for the entity."
-            },
-            "description": {
-               "type": "string",
-               "description": "A free-text description of the entity."
-            },
-            "extensions": {
-               "type": "array",
-               "ordered": true,
-               "items": {
-                  "$ref": "#/$defs/Extension"
-               }
-            },
-            "digest": {
-               "description": "A sha512t24u digest created using the VRS Computed Identifier algorithm.",
-               "type": "string",
-               "pattern": "[0-9A-Za-z_\\-]{32}"
-            },
-            "count": {
-               "oneOf": [
-                  {
-                     "$ref": "#/$defs/Range"
-                  },
-                  {
-                     "type": "integer"
-                  }
-               ],
-               "description": "The number of copies of the `variation` at a Genotype locus."
-            },
-            "variation": {
-               "oneOf": [
-                  {
-                     "$ref": "#/$defs/Allele"
-                  },
-                  {
-                     "$ref": "#/$defs/Haplotype"
-                  }
-               ],
-               "description": "A MolecularVariation at a Genotype locus."
-            }
-         },
-         "required": [
-            "count",
-            "variation"
-         ],
-         "additionalProperties": false
-      },
       "Range": {
-         "maturity": "Alpha",
+         "maturity": "draft",
          "description": "An inclusive range of values bounded by one or more integers.",
          "type": "array",
          "ordered": true,
@@ -1917,28 +1737,28 @@
          "minItems": 2
       },
       "Residue": {
-         "maturity": "Alpha",
+         "maturity": "draft",
          "description": "A character representing a specific residue (i.e., molecular species) or groupings of these (\"ambiguity codes\"), using [one-letter IUPAC abbreviations](https://en.wikipedia.org/wiki/International_Union_of_Pure_and_Applied_Chemistry#Amino_acid_and_nucleotide_base_codes) for nucleic acids and amino acids.",
          "type": "string",
          "pattern": "[A-Z*\\-]"
       },
       "SequenceString": {
-         "maturity": "Alpha",
+         "maturity": "draft",
          "description": "A character string of Residues that represents a biological sequence using the conventional sequence order (5\u2019-to-3\u2019 for nucleic acid sequences, and amino-to-carboxyl for amino acid sequences). IUPAC ambiguity codes are permitted in Sequence Strings.",
          "type": "string",
          "pattern": "^[A-Z*\\-]*$"
       },
       "Adjacency": {
-         "maturity": "Alpha",
+         "maturity": "draft",
          "ga4ghDigest": {
             "prefix": "AJ",
             "keys": [
+               "adjoinedSequences",
                "linker",
-               "sequenceTerminals",
                "type"
             ]
          },
-         "description": "The `Adjacency` class represents the termination of a sequence and (when present) the beginning of an adjacent sequence, potentially with an intervening linker sequence.",
+         "description": "The `Adjacency` class can represent either the termination of a sequence or the adjoining of the end of a sequence with the beginning of an adjacent sequence, potentially with an intervening linker sequence.",
          "type": "object",
          "properties": {
             "id": {
@@ -1960,17 +1780,17 @@
                   "$ref": "#/$defs/Extension"
                }
             },
-            "digest": {
-               "description": "A sha512t24u digest created using the VRS Computed Identifier algorithm.",
-               "type": "string",
-               "pattern": "[0-9A-Za-z_\\-]{32}"
-            },
             "type": {
                "type": "string",
                "const": "Adjacency",
                "default": "Adjacency",
                "description": "MUST be \"Adjacency\"."
             },
+            "digest": {
+               "description": "A sha512t24u digest created using the VRS Computed Identifier algorithm.",
+               "type": "string",
+               "pattern": "^[0-9A-Za-z_\\-]{32}$"
+            },
             "expressions": {
                "type": "array",
                "ordered": false,
@@ -1978,7 +1798,7 @@
                   "$ref": "#/$defs/Expression"
                }
             },
-            "sequenceTerminals": {
+            "adjoinedSequences": {
                "type": "array",
                "uniqueItems": false,
                "ordered": true,
@@ -1992,12 +1812,12 @@
                      }
                   ]
                },
-               "description": "Sequence terminals involved in the adjacency.",
+               "description": "The terminal sequence or pair of adjoined sequences that defines in the adjacency.",
                "minItems": 1,
                "maxItems": 2
             },
             "linker": {
-               "description": "A linker sequence found between the sequence terminals.",
+               "description": "The sequence found between adjoined sequences.",
                "oneOf": [
                   {
                      "$ref": "#/$defs/LengthExpression"
@@ -2012,7 +1832,7 @@
             }
          },
          "required": [
-            "sequenceTerminals"
+            "adjoinedSequences"
          ],
          "additionalProperties": false
       }
diff --git a/schema/merged.yaml b/schema/merged.yaml
index 64493d3..fb3974f 100644
--- a/schema/merged.yaml
+++ b/schema/merged.yaml
@@ -11,7 +11,7 @@ $defs:
     - $ref: '#/$defs/DescribedVariation'
     - $ref: '#/$defs/ProteinSequenceConsequence'
   ProteinSequenceConsequence:
-    maturity: Alpha
+    maturity: draft
     type: object
     description: A change that occurs in a protein sequence as a result of genomic
       changes. Due to the degenerate nature of the genetic code, there are often several
@@ -64,7 +64,6 @@ $defs:
           - $ref: '#/$defs/Allele'
           - $ref: '#/$defs/CopyNumberChange'
           - $ref: '#/$defs/CopyNumberCount'
-          - $ref: '#/$defs/Genotype'
           - $ref: '#/$defs/Haplotype'
           - $ref: '#/$defs/IRI'
       definingContext:
@@ -79,7 +78,7 @@ $defs:
     - type
     additionalProperties: false
   CanonicalAllele:
-    maturity: Alpha
+    maturity: draft
     description: A canonical allele is defined by an `Allele <https://vrs.ga4gh.org/en/2.0/terms_and_model.html#variation>`  that
       is representative of a collection of congruent Alleles, each of which depict
       the same nucleic acid  change on different underlying reference sequences. Congruent
@@ -131,7 +130,6 @@ $defs:
           - $ref: '#/$defs/Allele'
           - $ref: '#/$defs/CopyNumberChange'
           - $ref: '#/$defs/CopyNumberCount'
-          - $ref: '#/$defs/Genotype'
           - $ref: '#/$defs/Haplotype'
           - $ref: '#/$defs/IRI'
       definingContext:
@@ -145,7 +143,7 @@ $defs:
     - type
     additionalProperties: false
   CategoricalCnv:
-    maturity: Alpha
+    maturity: draft
     type: object
     description: A categorical variation domain is defined first by a sequence derived
       from a canonical [Location ](https://vrs.ga4gh.org/en/2.0/terms_and_model.html#Location)
@@ -199,7 +197,6 @@ $defs:
           - $ref: '#/$defs/Allele'
           - $ref: '#/$defs/CopyNumberChange'
           - $ref: '#/$defs/CopyNumberCount'
-          - $ref: '#/$defs/Genotype'
           - $ref: '#/$defs/Haplotype'
           - $ref: '#/$defs/IRI'
       location:
@@ -249,7 +246,7 @@ $defs:
     - type
     additionalProperties: false
   DescribedVariation:
-    maturity: Alpha
+    maturity: draft
     type: object
     description: Some categorical variation concepts are supported by custom nomenclatures
       or text-descriptive representations for which a categorical variation model
@@ -295,7 +292,6 @@ $defs:
           - $ref: '#/$defs/Allele'
           - $ref: '#/$defs/CopyNumberChange'
           - $ref: '#/$defs/CopyNumberCount'
-          - $ref: '#/$defs/Genotype'
           - $ref: '#/$defs/Haplotype'
           - $ref: '#/$defs/IRI'
       label:
@@ -313,7 +309,7 @@ $defs:
     additionalProperties: false
   Coding:
     type: object
-    maturity: Alpha
+    maturity: draft
     description: a concept codified by a terminology system.
     properties:
       label:
@@ -334,7 +330,7 @@ $defs:
     additionalProperties: false
   Mapping:
     type: object
-    maturity: Alpha
+    maturity: draft
     description: A mapping to a concept in a terminology system.
     properties:
       id:
@@ -372,7 +368,7 @@ $defs:
     additionalProperties: false
   Extension:
     type: object
-    maturity: Alpha
+    maturity: draft
     description: The Extension class provides VODs with a means to extend descriptions
       with other attributes unique to a content provider. These extensions are not
       expected to be natively understood under VRSATILE, but may be used for pre-negotiated
@@ -398,7 +394,7 @@ $defs:
     - name
     additionalProperties: false
   Code:
-    maturity: Alpha
+    maturity: draft
     description: Indicates that the value is taken from a set of controlled strings
       defined elsewhere. Technically, a code is restricted to a string which has at
       least one character and no leading or  trailing whitespace, and where there
@@ -407,7 +403,7 @@ $defs:
     pattern: \S+( \S+)*
     example: ENSG00000139618
   IRI:
-    maturity: Alpha
+    maturity: draft
     description: An IRI Reference (either an IRI or a relative-reference), according
       to `RFC3986 section 4.1  <https://datatracker.ietf.org/doc/html/rfc3986#section-4.1>`
       and `RFC3987 section 2.1 <https://datatracker.ietf.org/doc/html/rfc3987#section-2.1>`.
@@ -423,7 +419,7 @@ $defs:
     - $ref: '#/$defs/TraitSet'
   TraitSet:
     type: object
-    maturity: Alpha
+    maturity: draft
     description: A set of phenotype and/or disease concepts that together constitute
       a condition.
     properties:
@@ -474,7 +470,7 @@ $defs:
     additionalProperties: false
   Disease:
     type: object
-    maturity: Alpha
+    maturity: draft
     description: A particular abnormal condition that negatively affects the structure
       or function  of all or part of an organism and is not immediately due to any
       external injury.
@@ -517,7 +513,7 @@ $defs:
     additionalProperties: false
   Phenotype:
     type: object
-    maturity: Alpha
+    maturity: draft
     description: An observable characteristic or trait of an organism.
     properties:
       id:
@@ -566,7 +562,7 @@ $defs:
     - $ref: '#/$defs/TherapeuticSubstituteGroup'
   TherapeuticAction:
     type: object
-    maturity: Alpha
+    maturity: draft
     description: A therapeutic action taken that is intended to alter or stop a pathologic
       process.
     properties:
@@ -608,7 +604,7 @@ $defs:
     additionalProperties: false
   TherapeuticAgent:
     type: object
-    maturity: Alpha
+    maturity: draft
     description: An administered therapeutic agent that is intended to alter or stop
       a pathologic process.
     properties:
@@ -650,7 +646,7 @@ $defs:
     additionalProperties: false
   CombinationTherapy:
     type: object
-    maturity: Alpha
+    maturity: draft
     description: A therapeutic procedure that involves multiple different therapeutic
       procedures  performed in combination.
     properties:
@@ -704,7 +700,7 @@ $defs:
     additionalProperties: false
   TherapeuticSubstituteGroup:
     type: object
-    maturity: Alpha
+    maturity: draft
     description: A group of therapeutic procedures that may be treated as substitutes
       for one another.
     properties:
@@ -756,7 +752,7 @@ $defs:
     - type
     additionalProperties: false
   Gene:
-    maturity: Alpha
+    maturity: draft
     description: A basic physical and functional unit of heredity.
     type: object
     properties:
@@ -803,14 +799,13 @@ $defs:
     - $ref: '#/$defs/Allele'
     - $ref: '#/$defs/CopyNumberChange'
     - $ref: '#/$defs/CopyNumberCount'
-    - $ref: '#/$defs/Genotype'
     - $ref: '#/$defs/Haplotype'
     discriminator:
       propertyName: type
   Expression:
     type: object
     privateTo: Variation
-    maturity: Alpha
+    maturity: draft
     description: Representation of a variation by a specified nomenclature or syntax
       for a Variation object.  Common examples of expressions for the description
       of molecular variation include the HGVS  and ISCN nomenclatures.
@@ -848,11 +843,10 @@ $defs:
     oneOf:
     - $ref: '#/$defs/CopyNumberChange'
     - $ref: '#/$defs/CopyNumberCount'
-    - $ref: '#/$defs/Genotype'
     discriminator:
       propertyName: type
   Allele:
-    maturity: Alpha
+    maturity: draft
     ga4ghDigest:
       prefix: VA
       keys:
@@ -879,16 +873,16 @@ $defs:
         ordered: true
         items:
           $ref: '#/$defs/Extension'
-      digest:
-        description: A sha512t24u digest created using the VRS Computed Identifier
-          algorithm.
-        type: string
-        pattern: '[0-9A-Za-z_\-]{32}'
       type:
         type: string
         const: Allele
         default: Allele
         description: MUST be "Allele"
+      digest:
+        description: A sha512t24u digest created using the VRS Computed Identifier
+          algorithm.
+        type: string
+        pattern: ^[0-9A-Za-z_\-]{32}$
       expressions:
         type: array
         ordered: false
@@ -910,7 +904,7 @@ $defs:
     - state
     additionalProperties: false
   Haplotype:
-    maturity: Alpha
+    maturity: draft
     ga4ghDigest:
       prefix: HT
       keys:
@@ -936,16 +930,16 @@ $defs:
         ordered: true
         items:
           $ref: '#/$defs/Extension'
-      digest:
-        description: A sha512t24u digest created using the VRS Computed Identifier
-          algorithm.
-        type: string
-        pattern: '[0-9A-Za-z_\-]{32}'
       type:
         type: string
         const: Haplotype
         default: Haplotype
         description: MUST be "Haplotype"
+      digest:
+        description: A sha512t24u digest created using the VRS Computed Identifier
+          algorithm.
+        type: string
+        pattern: ^[0-9A-Za-z_\-]{32}$
       expressions:
         type: array
         ordered: false
@@ -965,15 +959,15 @@ $defs:
           the same reference sequence as adjacent members. Alleles should not have
           overlapping or adjacent coordinates with neighboring Alleles. Neighboring
           alleles should be ordered  by ascending coordinates, unless represented
-          on a DNA inversion (following an end-defined sequence  terminal), in which
-          case they should be ordered in descending coordinates. Sequence references
-          MUST be consistent for all members between and including the end of one
-          Adjacency and the beginning of  another.
+          on a DNA inversion (following an Adjacency with  end-defined adjoinedSequences),
+          in which case they should be ordered in descending coordinates.  Sequence
+          references MUST be consistent for all members between and including the
+          end of one  Adjacency and the beginning of another.
     required:
     - members
     additionalProperties: false
   CopyNumberCount:
-    maturity: Alpha
+    maturity: draft
     ga4ghDigest:
       keys:
       - copies
@@ -1001,16 +995,16 @@ $defs:
         ordered: true
         items:
           $ref: '#/$defs/Extension'
-      digest:
-        description: A sha512t24u digest created using the VRS Computed Identifier
-          algorithm.
-        type: string
-        pattern: '[0-9A-Za-z_\-]{32}'
       type:
         type: string
         const: CopyNumberCount
         default: CopyNumberCount
         description: MUST be "CopyNumberCount"
+      digest:
+        description: A sha512t24u digest created using the VRS Computed Identifier
+          algorithm.
+        type: string
+        pattern: ^[0-9A-Za-z_\-]{32}$
       expressions:
         type: array
         ordered: false
@@ -1031,7 +1025,7 @@ $defs:
     - location
     additionalProperties: false
   CopyNumberChange:
-    maturity: Alpha
+    maturity: draft
     ga4ghDigest:
       keys:
       - copyChange
@@ -1059,16 +1053,16 @@ $defs:
         ordered: true
         items:
           $ref: '#/$defs/Extension'
-      digest:
-        description: A sha512t24u digest created using the VRS Computed Identifier
-          algorithm.
-        type: string
-        pattern: '[0-9A-Za-z_\-]{32}'
       type:
         type: string
         const: CopyNumberChange
         default: CopyNumberChange
         description: MUST be "CopyNumberChange"
+      digest:
+        description: A sha512t24u digest created using the VRS Computed Identifier
+          algorithm.
+        type: string
+        pattern: ^[0-9A-Za-z_\-]{32}$
       expressions:
         type: array
         ordered: false
@@ -1098,72 +1092,8 @@ $defs:
     - copyChange
     - location
     additionalProperties: false
-  Genotype:
-    maturity: Alpha
-    ga4ghDigest:
-      keys:
-      - count
-      - members
-      - type
-      prefix: GT
-    description: A quantified set of _in-trans_ MolecularVariation at a genomic locus.
-    type: object
-    properties:
-      id:
-        type: string
-        description: The 'logical' identifier of the entity in the system of record,
-          e.g. a UUID. This 'id' is  unique within a given system. The identified
-          entity may have a different 'id' in a different  system, or may refer to
-          an 'id' for the shared concept in another system (e.g. a CURIE).
-      label:
-        type: string
-        description: A primary label for the entity.
-      description:
-        type: string
-        description: A free-text description of the entity.
-      extensions:
-        type: array
-        ordered: true
-        items:
-          $ref: '#/$defs/Extension'
-      digest:
-        description: A sha512t24u digest created using the VRS Computed Identifier
-          algorithm.
-        type: string
-        pattern: '[0-9A-Za-z_\-]{32}'
-      type:
-        type: string
-        const: Genotype
-        default: Genotype
-        description: MUST be "Genotype"
-      expressions:
-        type: array
-        ordered: false
-        items:
-          $ref: '#/$defs/Expression'
-      members:
-        type: array
-        ordered: false
-        uniqueItems: true
-        minItems: 1
-        items:
-          $ref: '#/$defs/GenotypeMember'
-        description: Each GenotypeMember in `members` describes a MolecularVariation
-          and the count of that variation at the locus.
-      count:
-        oneOf:
-        - $ref: '#/$defs/Range'
-        - type: integer
-        description: The total number of copies of all MolecularVariation at this
-          locus, MUST be greater than or equal to the sum of GenotypeMember copy counts.
-          If greater than the total counts, this implies additional MolecularVariation
-          that are expected to exist but are not explicitly indicated.
-    required:
-    - count
-    - members
-    additionalProperties: false
   SequenceLocation:
-    maturity: Alpha
+    maturity: draft
     ga4ghDigest:
       keys:
       - end
@@ -1191,16 +1121,16 @@ $defs:
         ordered: true
         items:
           $ref: '#/$defs/Extension'
-      digest:
-        description: A sha512t24u digest created using the VRS Computed Identifier
-          algorithm.
-        type: string
-        pattern: '[0-9A-Za-z_\-]{32}'
       type:
         type: string
         const: SequenceLocation
         default: SequenceLocation
         description: MUST be "SequenceLocation"
+      digest:
+        description: A sha512t24u digest created using the VRS Computed Identifier
+          algorithm.
+        type: string
+        pattern: ^[0-9A-Za-z_\-]{32}$
       sequenceReference:
         oneOf:
         - $ref: '#/$defs/IRI'
@@ -1223,7 +1153,7 @@ $defs:
     required: []
     additionalProperties: false
   SequenceReference:
-    maturity: Alpha
+    maturity: draft
     ga4ghDigest:
       assigned: true
     type: object
@@ -1246,11 +1176,6 @@ $defs:
         ordered: true
         items:
           $ref: '#/$defs/Extension'
-      digest:
-        description: A sha512t24u digest created using the VRS Computed Identifier
-          algorithm.
-        type: string
-        pattern: '[0-9A-Za-z_\-]{32}'
       type:
         type: string
         const: SequenceReference
@@ -1258,7 +1183,7 @@ $defs:
         description: A `GA4GH RefGet <http://samtools.github.io/hts-specs/refget.html>`
           identifier for the referenced sequence,  using the sha512t24u digest.
         type: string
-        pattern: SQ.[0-9A-Za-z_\-]{32}
+        pattern: ^SQ.[0-9A-Za-z_\-]{32}$
       residueAlphabet:
         type: string
         description: The interpretation of the character codes referred to by the
@@ -1278,7 +1203,7 @@ $defs:
     discriminator:
       propertyName: type
   ReferenceLengthExpression:
-    maturity: Alpha
+    maturity: draft
     ga4ghDigest:
       keys:
       - length
@@ -1304,11 +1229,6 @@ $defs:
         ordered: true
         items:
           $ref: '#/$defs/Extension'
-      digest:
-        description: A sha512t24u digest created using the VRS Computed Identifier
-          algorithm.
-        type: string
-        pattern: '[0-9A-Za-z_\-]{32}'
       type:
         type: string
         const: ReferenceLengthExpression
@@ -1331,7 +1251,7 @@ $defs:
     - type
     additionalProperties: false
   LengthExpression:
-    maturity: Alpha
+    maturity: draft
     ga4ghDigest:
       keys:
       - length
@@ -1356,11 +1276,6 @@ $defs:
         ordered: true
         items:
           $ref: '#/$defs/Extension'
-      digest:
-        description: A sha512t24u digest created using the VRS Computed Identifier
-          algorithm.
-        type: string
-        pattern: '[0-9A-Za-z_\-]{32}'
       type:
         type: string
         const: LengthExpression
@@ -1374,7 +1289,7 @@ $defs:
     - type
     additionalProperties: false
   LiteralSequenceExpression:
-    maturity: Alpha
+    maturity: draft
     ga4ghDigest:
       keys:
       - sequence
@@ -1399,11 +1314,6 @@ $defs:
         ordered: true
         items:
           $ref: '#/$defs/Extension'
-      digest:
-        description: A sha512t24u digest created using the VRS Computed Identifier
-          algorithm.
-        type: string
-        pattern: '[0-9A-Za-z_\-]{32}'
       type:
         type: string
         const: LiteralSequenceExpression
@@ -1416,54 +1326,8 @@ $defs:
     - sequence
     - type
     additionalProperties: false
-  GenotypeMember:
-    privateTo: Genotype
-    ga4ghDigest:
-      keys:
-      - count
-      - variation
-    description: A class for expressing the count of a specific MolecularVariation
-      present _in-trans_ at a genomic locus represented by a Genotype.
-    type: object
-    properties:
-      id:
-        type: string
-        description: The 'logical' identifier of the entity in the system of record,
-          e.g. a UUID. This 'id' is  unique within a given system. The identified
-          entity may have a different 'id' in a different  system, or may refer to
-          an 'id' for the shared concept in another system (e.g. a CURIE).
-      label:
-        type: string
-        description: A primary label for the entity.
-      description:
-        type: string
-        description: A free-text description of the entity.
-      extensions:
-        type: array
-        ordered: true
-        items:
-          $ref: '#/$defs/Extension'
-      digest:
-        description: A sha512t24u digest created using the VRS Computed Identifier
-          algorithm.
-        type: string
-        pattern: '[0-9A-Za-z_\-]{32}'
-      count:
-        oneOf:
-        - $ref: '#/$defs/Range'
-        - type: integer
-        description: The number of copies of the `variation` at a Genotype locus.
-      variation:
-        oneOf:
-        - $ref: '#/$defs/Allele'
-        - $ref: '#/$defs/Haplotype'
-        description: A MolecularVariation at a Genotype locus.
-    required:
-    - count
-    - variation
-    additionalProperties: false
   Range:
-    maturity: Alpha
+    maturity: draft
     description: An inclusive range of values bounded by one or more integers.
     type: array
     ordered: true
@@ -1474,14 +1338,14 @@ $defs:
     maxItems: 2
     minItems: 2
   Residue:
-    maturity: Alpha
+    maturity: draft
     description: A character representing a specific residue (i.e., molecular species)
       or groupings of these ("ambiguity codes"), using [one-letter IUPAC abbreviations](https://en.wikipedia.org/wiki/International_Union_of_Pure_and_Applied_Chemistry#Amino_acid_and_nucleotide_base_codes)
       for nucleic acids and amino acids.
     type: string
     pattern: '[A-Z*\-]'
   SequenceString:
-    maturity: Alpha
+    maturity: draft
     description: "A character string of Residues that represents a biological sequence\
       \ using the conventional sequence order (5\u2019-to-3\u2019 for nucleic acid\
       \ sequences, and amino-to-carboxyl for amino acid sequences). IUPAC ambiguity\
@@ -1489,16 +1353,16 @@ $defs:
     type: string
     pattern: ^[A-Z*\-]*$
   Adjacency:
-    maturity: Alpha
+    maturity: draft
     ga4ghDigest:
       prefix: AJ
       keys:
+      - adjoinedSequences
       - linker
-      - sequenceTerminals
       - type
-    description: The `Adjacency` class represents the termination of a sequence and
-      (when present) the beginning of an adjacent sequence, potentially with an intervening
-      linker sequence.
+    description: The `Adjacency` class can represent either the termination of a sequence
+      or the adjoining of the end of a sequence with the beginning of an adjacent
+      sequence, potentially with an intervening linker sequence.
     type: object
     properties:
       id:
@@ -1518,22 +1382,22 @@ $defs:
         ordered: true
         items:
           $ref: '#/$defs/Extension'
-      digest:
-        description: A sha512t24u digest created using the VRS Computed Identifier
-          algorithm.
-        type: string
-        pattern: '[0-9A-Za-z_\-]{32}'
       type:
         type: string
         const: Adjacency
         default: Adjacency
         description: MUST be "Adjacency".
+      digest:
+        description: A sha512t24u digest created using the VRS Computed Identifier
+          algorithm.
+        type: string
+        pattern: ^[0-9A-Za-z_\-]{32}$
       expressions:
         type: array
         ordered: false
         items:
           $ref: '#/$defs/Expression'
-      sequenceTerminals:
+      adjoinedSequences:
         type: array
         uniqueItems: false
         ordered: true
@@ -1541,15 +1405,16 @@ $defs:
           oneOf:
           - $ref: '#/$defs/IRI'
           - $ref: '#/$defs/SequenceLocation'
-        description: Sequence terminals involved in the adjacency.
+        description: The terminal sequence or pair of adjoined sequences that defines
+          in the adjacency.
         minItems: 1
         maxItems: 2
       linker:
-        description: A linker sequence found between the sequence terminals.
+        description: The sequence found between adjoined sequences.
         oneOf:
         - $ref: '#/$defs/LengthExpression'
         - $ref: '#/$defs/LiteralSequenceExpression'
         - $ref: '#/$defs/ReferenceLengthExpression'
     required:
-    - sequenceTerminals
+    - adjoinedSequences
     additionalProperties: false
diff --git a/submodules/vrs b/submodules/vrs
index 774ea7a..62271fe 160000
--- a/submodules/vrs
+++ b/submodules/vrs
@@ -1 +1 @@
-Subproject commit 774ea7a3c9e3e2b8a20a8fb274c3055eb33f4515
+Subproject commit 62271fe053be437d6238b42bd9d40f1a576fa5cf