The conformance statement for XQueryX trivial embedding (which appears not in the XQueryX book but in XQuery section 5.2.7) is meaningless. It states:

[Definition: A conforming XQuery implementation that supports the Trivial XML Embedding Feature MUST provide the embedding specified in [XQueryX 1.0] Section 5, "A Trivial Embedding of XQuery."]

I need to decide whether my produce "supports" this feature. I therefore need to decide whether it "provides" this embedding. The answer is: I haven't got a single line of code in my product that relates to this feature, but it is nevertheless trivial for users to use this embedding (or any other). They just need to read the string value of the relevant XQueryX element in the containing XML document (easily done with a query) and submit that string to the query processor. Does this constitute support for the feature? I've no idea.

This feature is described in the status section as being "at risk". I would like to propose that it be pulled. The feature is so trivial as to be meaningless: it provides no useful level of interoperability, and users can embed queries in XML documents this way whether we say so or not.