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+{
+    "$schema": "https://json-schema.org/draft/2020-12/schema",
+    "title": "ATT&CK Mappings Unified Schema",
+    "description": "Defines the data elements and properties of Mappings Explorer projects",
+    "type": "object",
+    "properties": {
+        "metadata": {
+            "description": "Properties that apply to all mappings in a project.",
+            "type": "object",
+            "properties": {
+                "mapping_version": {
+                    "description": "The version of the mapping project.",
+                    "type": "string"
+                },
+                "attack_version": {
+                    "description": "The version of ATT&CK used to source the objects included in this mapping.",
+                    "type": "string"
+                },
+                "technology_domain": {
+                    "description": "ATT&CK Technology Domain (Enterprise, Mobile, ICS).",
+                    "type": "array",
+                    "items": {
+                        "enum": [
+                            "enterprise",
+                            "mobile",
+                            "ics"
+                        ]
+                    }
+                },
+                "creation_date": {
+                    "description": "Creation date of this mapping file. Format: (MM/DD/YYYY) 1/21/2021",
+                    "type": "string",
+                    "pattern": "^[0-9]{2}/[0-9]{2}/[0-9]{4}$"
+                },
+                "last_update": {
+                    "description": "Last update date of this mapping file. Format: (MM/DD/YYYY) 1/21/2021",
+                    "type": "string",
+                    "pattern": "^[0-9]{2}/[0-9]{2}/[0-9]{4}$"
+                },
+                "mapping_framework": {
+                    "description": "The group of objects being mapped to ATT&CK.",
+                    "type": "array",
+                    "items": {
+                        "enum": [
+                            "veris",
+                            "nist_800_53",
+                            "cve",
+                            "aws",
+                            "gcp",
+                            "azure"
+                        ]
+                    }
+                },
+                "mapping_framework_version": {
+                    "description": "The Mapping Framework's version.",
+                    "type": "string"
+                },
+                "mapping_framework_version_scheme": {
+                    "description": "How the Mapping Framework is versioned.",
+                    "type": "array",
+                    "items": {
+                        "enum": [
+                            "framework",
+                            "date_accessed"
+                        ]
+                    }
+                },
+                "author": {
+                    "description": "The author of this mapping file.",
+                    "type": "string"
+                },
+                "contact": {
+                    "description": "The email address of the author.",
+                    "type": "string"
+                },
+                "organization": {
+                    "description": "The organization associated with the author.",
+                    "type": "string"
+                },
+                "mapping_types": {
+                    "description": "The mappings types that are associated with each Framework.",
+                    "type": "array",
+                    "items": {
+                        "type": "object",
+                        "properties": {
+                            "id": {
+                                "description": "The mapping type's identifier.",
+                                "type": "string"
+                            },
+                            "description": {
+                                "description": "A description of the mapping type.",
+                                "type": "string"
+                            }
+                        }
+                    }
+                }
+            },
+            "required": [
+                "mapping_version",
+                "attack_version",
+                "technology_domain",
+                "creation_date",
+                "mapping_framework",
+                "mapping_framework_version",
+                "mappings_types"
+            ]
+        },
+        "mapping_object": {
+            "description": "A single mapping between framework object and ATT&CK object.",
+            "type": "array",
+            "items": {
+                "type": "object",
+                "properties": {
+                    "attack_object_id": {
+                        "description": "The unique identifier of the ATT&CK object being mapped. (T1648)",
+                        "type": "string"
+                    },
+                    "attack_object_name": {
+                        "description": "The name of the ATT&CK object. (Serverless Execution)",
+                        "type": "string"
+                    },
+                    "capability_id": {
+                        "description": "Unique identifier of the framework object being mapped.",
+                        "type": "string"
+                    },
+                    "capability_description": {
+                        "description": "Name or description of framework object",
+                        "type": "string"
+                    },
+                    "comments": {
+                        "description": "Used to document assumptions, circumstances, or other information regarding the mapping",
+                        "type": "string"
+                    },
+                    "references": {
+                        "description": "A list of links to documentation that provides additional detail in understanding the data contained in this mapping. (A link to the documentation for a security control.)",
+                        "type": "string"
+                    },
+                    "mapping_type": {
+                        "description": "Mapping type has framework-specific values. This property describes how the capability_id and attack_object_id are related.",
+                        "type": "string"
+                    },
+                    "if": {
+                        "properties": {
+                            "mapping_type": {
+                                "const": "technique_scores"
+                            }
+                        }
+                    },
+                    "then": {
+                        "properties": {
+                            "score_category": {
+                                "description": "Assessment of the effectiveness of the mitigations provided. (Protect, Detect, Respond)",
+                                "type": "array",
+                                "items": {
+                                    "enum": [
+                                        "protect",
+                                        "detect",
+                                        "respond"
+                                    ]
+                                }
+                            },
+                            "score_value": {
+                                "description": "The score. (e.g. Minimal, Partial, Significant)",
+                                "type": "array",
+                                "items": {
+                                    "enum": [
+                                        "minimal",
+                                        "partial",
+                                        "significant"
+                                    ]
+                                }
+                            },
+                            "related_score": {
+                                "description": "When the ATT&CK object ID is a sub-technique, related score contains the parent technique ID.",
+                                "type": "string"
+                            }
+                        }
+                    },
+                    "else": {}
+                },
+                "required": [
+                    "mapping_type",
+                    "capability_id"
+                ],
+                "dependentRequired":{
+                    "mapping_type":["valid_mapping_types"]
+                }
+            }
+        }
+    }
+}