Merge pull request #142 from linkml/revert-140-revert-132-cmungall-patch-8

Revert "Revert "removing shexjsg""

Author: cmungall

linkml_runtime/utils/metamodelcore.py

@@ -6,7 +6,6 @@
 from typing import Union, Optional, Tuple
 from urllib.parse import urlparse
 
-from ShExJSG.ShExJ import IRIREF, PN_PREFIX
 from rdflib import Literal, BNode, URIRef
 from rdflib.namespace import is_ncname
 from rdflib.term import Identifier as rdflib_Identifier
@@ -137,9 +136,13 @@ def __init__(self, v: str) -> None:
             raise ValueError(f"{v}: is not a valid URI")
         super().__init__(v)
 
+    # this is more inclusive than the W3C specification
+    #uri_re = re.compile("^[A-Za-z]\\S*$")
+    uri_re = re.compile("^\\S+$")
+
     @classmethod
     def is_valid(cls, v: str) -> bool:
-        return v is not None and not URIorCURIE.is_curie(v) and isinstance(v, IRIREF)
+        return v is not None and not URIorCURIE.is_curie(v) and cls.uri_re.match(v)
 
 
 class Curie(URIorCURIE):
@@ -172,7 +175,8 @@ def ns_ln(cls, v: str) -> Optional[Tuple[str, str]]:
     @classmethod
     def is_valid(cls, v: str) -> bool:
         pnln = cls.ns_ln(v)
-        return pnln is not None and (not pnln[0] or isinstance(pnln[0], PN_PREFIX))
+        #return pnln is not None and (not pnln[0] or isinstance(pnln[0], PN_PREFIX))
+        return pnln is not None
 
     # This code was extracted from the termorcurie package of the rdfa
     def as_uri(self, nsm: Namespaces) -> Optional[URIRef]: