Register all Parser plugins as SPARQL ResultParser plugins

Author: white-gecko

rdflib/plugin.py

@@ -579,12 +579,6 @@ def plugins(
     "rdflib.plugins.sparql.results.xmlresults",
     "XMLResultParser",
 )
-register(
-    "application/rdf+xml",
-    ResultParser,
-    "rdflib.plugins.sparql.results.graph",
-    "GraphResultParser",
-)
 register(
     "json",
     ResultParser,
@@ -621,3 +615,10 @@ def plugins(
     "rdflib.plugins.sparql.results.tsvresults",
     "TSVResultParser",
 )
+for parser in list(plugins(kind=Parser)):
+    register(
+        parser.name,
+        ResultParser,
+        "rdflib.plugins.sparql.results.graph",
+        "GraphResultParser",
+    )