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-rw-r--r--include/serd/serd.h6
1 files changed, 5 insertions, 1 deletions
diff --git a/include/serd/serd.h b/include/serd/serd.h
index 375a8c5d..41ee9993 100644
--- a/include/serd/serd.h
+++ b/include/serd/serd.h
@@ -834,7 +834,11 @@ serd_env_expand(const SerdEnv* SERD_NONNULL env,
SerdStringView* SERD_NONNULL uri_suffix);
/**
- Expand `node`, which must be a CURIE or URI, to a full URI.
+ Expand `node`, transforming CURIEs into URIs.
+
+ If `node` is a relative URI reference, it is expanded to a full URI if
+ possible. If `node` is a literal, its datatype is expanded if necessary.
+ If `node` is a CURIE, it is expanded to a full URI if possible.
Returns null if `node` can not be expanded.
*/