Many thanks for explaining, Christian - that makes sense. Thank you also for 10.6! All the best, Andrew On Wed, 10 May 2023 at 21:34, Christian Grün <christian.gruen@gmail.com> wrote:

Hi Andrew,

...

'contains(.,">")', … return true, as expected.

The difference is that < and > don’t have to be encoded if they are used in strings. You can write…

contains('', '<')

…but the following query is invalid:

contains('<', '&')

...

I can get the expected result if I double-escape the entity: 'contains(.,"&amp;")'

You can use the string constructor syntax, it’s often better readable:

xquery:eval( ``[contains(., "&")]``, map { '': <foo>{ ``[&<]`` }</foo> } )

With recent versions of BaseX, you can also use simple backticks (that’s XQuery 4 syntax, it will be documented soon). The following queries are equivalent:

`&` ``[&]`` "&"

Hope this helps, Christian