Unit test: xlink.004

Testing several flavors of XLink with xlink-style=inline.

What about DocBook [DocBook.org, DocBook on Wikipedia] and XQuery [XQuery-related links: XQuery specification, XQuery WG, XQuery on Wikipedia] ?

And would MarkLogic [MarkLogic, MarkLogic at Wikipedia] work?

And would MLS [MarkLogic, MarkLogic at Wikipedia] work?

And would nwalsh.com work?

Inline extended link on target: link from here to there.

Inline extended link on source: link from here to there.