Hello,

I've a plan to snowball refactored SSAX-SXML package.

It'll likely include the following components:

  1. XML parsing - SSAX, W3C compliant

  2. HTML parsing - Neil van Dyke's HtmlPrag

  3. SXPath - including full support for W3C XPath syntax and
     location-step functions in Scheme. Provides expressive power of XQuery.

  4. SXLink - W3C compliant, but without support for points and ranges

  5. XQuery Update Facility - no XQuery, just updates with Patrick Lehti syntax

  6. XSLT-like transformation - but XSLT compatibility is unlikely

  7. Descriptive XML schema - DataGuides

  8. Serialization to XML and HTML, including pretty printing

  9. ... and more :-)

Almost all of the code exists and is used in production for years, so it's mostly about
refactoring/optimization/better packaging/easy of use.

API would be streamlined and much smaller comparing to current SSAX-SXML
packages.

The package is currently developed and deployed as Chicken egg, but it should
also  support Bigloo, Gambit and PLT, and Snow looks like a reasonable way to achieve this.

The latest Chicken package at SourceForge
  http://sourceforge.net/project/showfiles.php?group_id=30687&package_id=192751
provides very similar functionality.

We collaborate with Dmitry Lizorkin, and this package may be considered as
a lightweight and streamlined version of the packages maintained by him.

 It's worth a note that packaging SSAX as a separate package is quite possible
and even may be a good idea. In the past SXML-tools and SSAX were packaged
as two separate packages, but SXML-tools heavily depended on SSAX because
SSAX package included "common library" code, such as string processing and
even I/O. The code is very portable but it even comes with its own "local" SRFI-13 :-)
I'd love to change this with Snow!

So, hopefully, with Snow this support code may be moved out of
SSAX, and SSAX-SXML package may be decomposed as three different
packages:
   1. SSAX
   2. SSAX-independent SXML-tools
   3. Other SXML-tools (such as SXLink), this package depends on two others. 

If you are interested in snowballing SSAX - please let me know, Dmitry and I
will be glad to collaborate.

Best regards,
         Kirill Lisovsky.


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