sxml-match: Pattern Matching of SXML

This Scheme library provides syntactic forms for pattern matching of SXML, in a "by example" style reminiscent of the pattern matching of the syntax-rules and syntax-case macro systems. Three macros are provided: sxml-match, sxml-match-let, and sxml-match-let*.

Compared to a standard s-expression pattern matcher, sxml-match provides the following benefits:

• matching of SXML elements does not depend on any degree of normalization of the SXML
• matching of SXML attributes (within an element) is under-ordered; the order of the attributes specified within the pattern need not match the ordering with the element being matched
• all attributes specified in the pattern must be present in the element being matched; in the spirit that XML is 'extensible', the element being matched may include additional attributes not specified in the pattern.

The present library is a descendant of WebIt!, and was inspired by an s-expression pattern matcher developed by Erik Hilsdale, Dan Friedman, and Kent Dybvig at Indiana University.

Three versions of the implementation are provided below, supporting a range of Scheme implementations.

• HTML version
• text version

• sxml-match collection .plt file for PLT v209 or later - installation as a collection; includes the text version of the manual
• sxml-match.ss - installation as a standalone module
• Test cases

Via PLaneT (for v299.x-3xx):

• (require (planet "sxml-match.ss" ("jim" "sxml-match.plt" 1 0)))

• sxml-match.ss
• Test cases

• sxml-match.ss
• Test cases