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ABENREGEX_XSD_SYNTAX - REGEX XSD SYNTAX

ABENREGEX_XSD_SYNTAX - REGEX XSD SYNTAX

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- XSD Syntax

Objects for XSD regular expressions can be created with the factory method CREATE_XSD of the system class CL_ABAP_REGEX to be used in statements FIND and REPLACE or with the system class CL_ABAP_MATCHER.

Currently, there is no detailed description of the XSD syntax for regular expressions in the ABAP keyword documentation.

  • For a short syntax overview, see
Special Characters in XSD Regular Expressions
  • For the complete documentation, please refer to
Regular expressions in XSD 1.0 and 1.1.

Notes

  • A regular expression with XSD syntax cannot be specified directly as a character string in the statements FIND and REPLACE, but you can use objects of CL_ABAP_REGEX that are created with method CREATE_XSD with the addition REGEX instead.
  • XSD Syntax is a subset of XPath syntax. There are mainly the following differences:
  • In a XSD regular expression, ^ and $ are not special characters for start and end of a line.

  • There is no XSD syntax for non-greedy behavior.

  • There is no XSD syntax for subgroups without registration

  • There is no XSD syntax for back references

  • The test and demonstration program DEMO_REGEX allows XSD syntax to be tested by selecting XSD.

The following example uses XSD syntax that is invalid for PCRE and does not find any matches for POSIX. It would work also for XPath. The regular expression contains special characters \i and \c that match any character that can be the first character of an XML name or any character that can occur after the first character of an XML name. The result of the replacement is <ns:tag1><ns:tag2>...</ns:tag2></ns:tag1>.






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