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-rw-r--r--schemas/xsd.ttl3
1 files changed, 2 insertions, 1 deletions
diff --git a/schemas/xsd.ttl b/schemas/xsd.ttl
index 3a32cb6..a800e1d 100644
--- a/schemas/xsd.ttl
+++ b/schemas/xsd.ttl
@@ -35,7 +35,8 @@ xsd:anyURI
rdfs:subClassOf xsd:token .
xsd:base64Binary
- a rdfs:Datatype .
+ a rdfs:Datatype ;
+ xsd:pattern "(?:[A-Za-z0-9+/]{4})*(?:[A-Za-z0-9+/]{2}==|[A-Za-z0-9+/]{3}=)?$" .
xsd:boolean
a rdfs:Datatype ;