Does Saxon support XPath 3.1?

I apologize if I am asking for something obvious, but straightforward
searching didn't locate any statements about Saxon support
(implementation) of the XPath 3.1 W3C Standard.

My question:

"Does Saxon implement XPath 3.1? If not, is there any planned timeline
for incorporating such support?"

BaseX in its latest version supports XPath 3.1 and I would like to use
it. The people who call my "Xpath-all" style even when writing
transformations "extreme" and are "not at all convinced  whether there
is really a use case for ... writing a large part of the application
in XPath"  -- these people might now better understand why some
programmers would have BaseX as their only choice at present.

Or, are these facts incorrect?

-- 
Cheers,
Dimitre Novatchev
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Truly great madness cannot be achieved without significant intelligence.
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To invent, you need a good imagination and a pile of junk
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Never fight an inanimate object
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To avoid situations in which you might make mistakes may be the
biggest mistake of all
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Quality means doing it right when no one is looking.
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You've achieved success in your field when you don't know whether what
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To achieve the impossible dream, try going to sleep.
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Facts do not cease to exist because they are ignored.
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Typing monkeys will write all Shakespeare's works in 200yrs.Will they
write all patents, too? :)
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Sanity is madness put to good use.
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I finally figured out the only reason to be alive is to enjoy it.