add geo-literal note and example (#112)
diff --git a/source/documentation/geosparql/__index.md b/source/documentation/geosparql/__index.md
index e12dde3..5cb2357 100644
--- a/source/documentation/geosparql/__index.md
+++ b/source/documentation/geosparql/__index.md
@@ -336,6 +336,12 @@
be switched on independently of the indexes, i.e. query rewriting can be
performed but an index is configured to not store the result.
+As an extension to the standard, supplying a `Geometry Literal` is
+also permitted. For example:
+
+ ?subj geo:sfContains "POINT(0 0)"^^geo:wktLiteral .
+
+
### Dataset Conversion
Methods to convert datasets between serialisations and spatial/coordinate
