Add PIDINST_Identifier, link with Resource (#26)

README.md

@@ -62,7 +62,7 @@ for instance the [ORCID Identifier](./entities/ORCID_Identifier.md), [ROR Identi
 or [Local Agent Identifier](./entities/Local_Agent_Identifier.md). 
 
 A Resource can have any number of [Resource Identifiers](./entities/Resource_Identifier.md) assigned,
-for instance the [DOI Identifier](./entities/DOI_Identifier.md), [Wikidata Resource Identifier](./entities/Wikidata_Resource_Identifier.md), or [Local Resource Identifier](./entities/Local_Resource_Identifier.md).
+for instance the [DOI Identifier](./entities/DOI_Identifier.md), [Wikidata Resource Identifier](./entities/Wikidata_Resource_Identifier.md), [PIDINST Identifier](./entities/PIDINST_Identifier.md), or [Local Resource Identifier](./entities/Local_Resource_Identifier.md).
 
 ## Listings
 
@@ -122,6 +122,7 @@ for instance the [DOI Identifier](./entities/DOI_Identifier.md), [Wikidata Resou
 * [Resource Identifier](./entities/Resource_Identifier.md)
   * [DOI identifier](./entities/DOI_Identifier.md)
   * [Wikidata Resource Identifier](./entities/Wikidata_Resource_Identifier.md)
+  * [PIDINST Identifier](./entities/PIDINST_Identifier.md)
   * [Local Resource Identifier](./entities/Local_Resource_Identifier.md)
 
 ### Data Types
@@ -134,6 +135,7 @@ for instance the [DOI Identifier](./entities/DOI_Identifier.md), [Wikidata Resou
 * [ROR ID Type](./datatypes/ROR_ID.md)
 * [URI Type](./datatypes/URI.md)
 * [DOI ID Type](./datatypes/DOI_ID.md)
+  * [PIDINST ID Type](./datatypes/PIDINST_ID.md)
 * [Fundref ID Type](./datatypes/FundRef_ID.md)
 * [ISNI ID Type](./datatypes/ISNI_ID.md)
 * [Wikidata ID Type](./datatypes/Wikidata_ID.md)

datatypes/PIDINST_ID.md

@@ -0,0 +1,8 @@
+# The PIDINST datatype
+
+## Definition
+The datatype that represents the [PIDINST Identifiers](https://www.pidinst.org/).
+
+## Specialization of
+[DOI ID](../datatypes/DOI_ID.md)
+

diagrams/core.puml

@@ -362,6 +362,12 @@
 
     "Resource_Identifier" <|-- "Wikidata_Resource_Identifier"
 
+    class "PIDINST_Identifier" #ffffff {
+        pidinstId : PIDINST_ID
+    }
+
+    "Resource_Identifier" <|-- "PIDINST_Identifier"
+
     class "Local_Resource_Identifier" #ffffff {
         localId : Local_Resource_ID
     }

entities/PIDINST_Identifier.md

@@ -0,0 +1,19 @@
+# PIDINST Identifier
+
+## Definition
+A PIDINST<sup>[1](#fn1)</sup> identifier assigned to a [Resource](../entities/Resource.md), usually an instrument.
+
+## Specialization of
+[Resource Identifier](../entities/Resource_Identifier.md)
+
+## Attributes
+Besides those of [Resource Identifier](../entities/Resource_Identifier.md):
+
+PIDINST ID : [PIDINST ID Type](../datatypes/PIDINST_ID.md)
+
+## Relationships
+None besides those of [Resource Identifier](../entities/Resource_Identifier.md).
+
+---
+## References
+<a name="fn1">\[1\]</a> Persistent Identifiers of Instruments, https://www.pidinst.org/