diff --git a/README.md b/README.md
index c698744..bb6219e 100644
--- a/README.md
+++ b/README.md
@@ -14,7 +14,7 @@ It is desgined to support streaming parsing and provide great performance in a J
 - The `datatype` and `lang` fields are only used when the `object` represents a Literal value (i.e. not a URI, but a string / date / something else).
 - When expressing an Object that is a NamedNode, use this string as the datatype: "http://www.w3.org/1999/02/22-rdf-syntax-ns#namedNode" ([discussion](https://github.com/ontola/hextuples/issues/1))
 - When expressing an Object that is a BlankNode, use this string as the datatype: "http://www.w3.org/1999/02/22-rdf-syntax-ns#blankNode"
-- The `graph` field does not support blank nodes. ([discussion](https://github.com/ontola/hextuples/issues/2))
+- If the `graph` is a blank node (i.e. anonymous), use an underscore as the URI scheme: `_:myNode`. ([discussion](https://github.com/ontola/hextuples/issues/2)). Parsers SHOULD interpret these as blank graphs, but MAY discard these if they have no support for them.
 - When a field has no value, use an empty string: `""`
 
 ## Example