XQuery Update facility  [ https://www.w3.org/TR/xquery-update-10/
<https://www.w3.org/TR/xquery-update-10/>  ] is an extension.

Saxon supports in only with licenses Saxon EE, not available in free Saxon HE.

XQuery Update is included in BaseX implementation:
http://docs.basex.org/wiki/XQuery_Update
<http://docs.basex.org/wiki/XQuery_Update>

(  Ibm not sure  about eXist implementation, but I think itbs included.
)

There are some extra command line flags needed to turn on update in place for
both BaseX and Saxon.
( Or, using Saxon from Oxygen, flags are set in Oxygen preferences. )

You can also output modified XML instead of update in place using COPY/MODIFY,
or  transform with syntax (if available).

XSLT is better if you are doing a complete transform/rearrangement of a
document, but XQuery seems simpler if you are just adding/deleting/modifying a
particular element  or adding attributes to an existing nodes.


b Steve Majewski



> On Oct 17, 2019, at 11:55 AM, Costello, Roger L. costello@xxxxxxxxx
<xsl-list-service@xxxxxxxxxxxxxxxxxxxxxx> wrote:
>
> Hi Folks,
>
> It's been a long time since I've looked at XQuery.
>
> I need to identify certain elements in XHTML documents and then either
remove the elements or modify their values. Can XQuery do this? Are there free
XQuery tools?
>
> XHTML --> XQuery --> XHTML' (a modified version of the input XHTML
document)
>
> /Roger