Proposal: Add string types for encoding document paths.

Partially addresses linkml/linkml#1470

Author: cmungall

linkml_model/model/schema/types.yaml

@@ -155,3 +155,31 @@ types:
     base: NodeIdentifier
     repr: str
     description: A URI, CURIE or BNODE that represents a node in a model.
+
+  jsonpointer:
+    uri: xsd:string
+    base: str
+    repr: str
+    description: >-
+      A string encoding a JSON Pointer. The value of the string MUST conform to JSON Point syntax and
+      SHOULD dereference to a valid object within the current instance document when encoded in tree form.
+    conforms_to: https://datatracker.ietf.org/doc/html/rfc6901
+
+  jsonpath:
+    uri: xsd:string
+    base: str
+    repr: str
+    description: >-
+      A string encoding a JSON Path. The value of the string MUST conform to JSON Point syntax and
+      SHOULD dereference to zero or more valid objects within the current instance document when encoded
+      in tree form.
+    conforms_to: https://www.ietf.org/archive/id/draft-goessner-dispatch-jsonpath-00.html
+
+  sparqlpath:
+    uri: xsd:string
+    base: str
+    repr: str
+    description: >-
+      A string encoding a SPARQL Property Path. The value of the string MUST conform to SPARQL syntax and
+      SHOULD dereference to zero or more valid objects within the current instance document when encoded as RDF.
+    conforms_to: https://www.w3.org/TR/sparql11-query/#propertypaths