Saxon

It would be good to add more in the documentation about the s9api interface mechanisms for navigating XML documents using Java Streams (which was new in 9.9). i.e. the s9api classes Step, Predicate, etc. (These are also going to be available in the .NET API in Saxon 10.)

There is a good section of information in the change log, under 9.9 changes in the S9API interface (see "Navigating XML Documents Using s9api" at http://www.saxonica.com/documentation/index.html#!changes/s9api/9.8-9.9); but information only in the change log can easily get buried. There is a brief mention under xpath-api/xdm-values, and the javadoc comments are also fairly good (e.g. they provide a few examples); but further details, and examples, in another section of the documentation would be useful for new users.