[plt-scheme] xexprs and sxml
> Given the deeply complex nature of the XML <-> scheme-data
> transformation, I think a direct transformation between xexprs and SXML
> would be vastly preferable. Furthermore, I think it's pretty much
> trivial. The only thing to worry about is tools that accept xexprs and
You'd hope, but I hit a snag last night. Entities (e.g., in HTML)
are pre-expanded by a parser according to the DTD, so you don't end up
with any entities in SXML that's parsing from XML. But if someone writes
an x-expression with an entity in it:
(html (body (p "foo" nbsp "bar")))
then you have to know what to generate from the entity. If you have a
DTD, you have to parse it and interpret it. If you don't, you have to
guess. Either way, non-trivial.
> assume the presence of the modifier-thingy list. For this reason, I
> think I would design the SXML->xexpr translation to always include the
> modifier-thingy list, even if empty.
I have no idea what you're talking about.
> Then, you can staple those onto the web server with things like 'send-
> suspend/sxml', and spend more time on research. No?
Anton's suggestion was just to go SXML -> XML and pass the strings to
the web-server, essentially bypassing any of the web-server's use of
x-expressions at all. Lower-tech, but something that works now without
me having to generate a mapping.
> P.S.: do you have any way (other than WebIt) to transform SXML into
> XML? Because I've looked, and couldn't find anything.
WebIt! is the best one I know. There's also TonyG's planet package:
http://planet.plt-scheme.org/#xxexpr.plt1.0
but that appears to be imprecise.
Dave