Part 4 is not clear about the maxReferencesToReturn parameter in the Query service. Suppose a NodeTypeDescription in a query request contains several QueryDataDescriptions, say five, and one of those, say the third, contains a BrowsePath with an empty target name in the last BrowsePathElement. Suppose there is a node which has 100 references matching the given BrowsePath.

According to the spec, a QueryDataSet is returned for this node which contains the five requested values, amongst them an array of 50 ReferenceDescriptions at position 3. However, is it not clear which values the continued QueryDataSet (returned by QueryNext) shall contain at position 1, 2, 4 and 5. Shall the server cache the values returned by QueryFirst and return them again, shall it return null values?