Aw: [xsl] Need an XPath expression which returns all xs:pattern elements containing a regex that permits an unbounded number of characters

["Martin Honnen martin.honnen@xxxxxx" <xsl-list-service@xxxxxxxxxxxxxxxxxxxxxx>]

Well, instead of contains use matches with a regular expression, I
suppose.

--
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gesendet.Am 04.04.24, 14:29 schrieb "Roger L Costello costello@xxxxxxxxx"
<xsl-list-service@xxxxxxxxxxxxxxxxxxxxxx>:

  Hi Folks,

  I want to find, in an XML Schema, all xs:pattern elements containing
  a regex that permits an unbounded number of characters.

  Here are examples of xs:pattern elements that I want to find:

  <xs:pattern value="A*"/>
  <xs:pattern value="A+"/>
  <xs:pattern value="A{0,.}"/>
  <xs:pattern value="A{1,.}"/>

  I do not want either of the following xs:pattern elements because --
  due to the escape symbol -- they do not permit an unbounded number of
  characters:

  <xs:pattern value="A\*"/>
  <xs:pattern value="A\+"/>

  I created an XPath 2.0 expression to find the desired xs:pattern
  elements:

  xs:pattern[
  contains(@value, '*') or
  contains(@value, '+') or
  contains(@value, '{1,}') or
  contains(@value, '{0,}')
  ]

  Eek! That is not correct. It incorrectly returns the xs:pattern
  elements with escaped asterisk and escaped plus symbols:

  <xs:pattern value="A\*"/>
  <xs:pattern value="A\+"/>

  How to fix my XPath expression? Is the solution to add a second
  predicate:

  xs:pattern[
  contains(@value, '*') or
  contains(@value, '+') or
  contains(@value, '{1,}') or
  contains(@value, '{0,}')
  ][
  not(contains(@value, '\*')) and
  not(contains(@value, '\+'))
  ]

  Is that correct? Is that the best approach? Is there a better
  approach?

  Bonus points if you can answer this question: Is my XPath expression
  catching all xs:pattern elements that have a regex that permits an
  unbounded number of characters?

  Note: For reasons that I will not explain, the XPath expression must
  be an XPath 2.0 expression.

  /Roger

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