[plt-scheme] Announce: sxml-match, a pattern matcher for SXML

sxml-match provides pattern matching "by example" for SXML:
    http://celtic.benderweb.net/sxml-match/

The following example provides a brief illustration, transforming an music 
album catalog language into HTML.
   (define (album->html x)
     (sxml-match x
       [(album (@ (title ,t)) (catalog (num ,n) (fmt ,f)) ...)
        `(ul (li ,t)
             (li (b ,n) (i ,f)) ...)]))

sxml-match is based directly on the pattern matcher in WebIt! 2.0, but is 
standalone, and uses the standard SXML notation for attributes, rather than 
WebIt!'s keywords.

A manual for sxml-match is available on the web site:
    http://celtic.benderweb.net/sxml-match/manual/

The implementation is supported under PLT Scheme, (Petite) Chez Scheme and 
SISC.

Jim Bender
http://celtic.benderweb.net/
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