[Caml-list] XML output

[Rémi Dewitte]

Hello,

I have used pxp to parse xml and I am happy with it. I'd like now to produce
xml and wonder what are the options to do so (possibly the simpliest).

I think I am going to start with the Printf module. I wonder how well it
handles utf8 for example. And I'll have to write a kind of xml_encode
function. I am pretty sure it has already be done somewhere !

Many thanks,
Rémi

[Gerd Stolpmann]

Am Dienstag, den 17.03.2009, 12:01 +0100 schrieb Rémi Dewitte:
> Hello,
>
> I have used pxp to parse xml and I am happy with it. I'd like now to
> produce xml and wonder what are the options to do so (possibly the
> simpliest).

Maybe not the simplest: Use the PXP preprocessor to create the output
tree, and print the tree:

http://projects.camlcity.org/projects/dl/pxp-1.2.1/doc/manual/html/ref/Intro_preprocessor.html
http://projects.camlcity.org/projects/dl/pxp-1.2.1/doc/manual/html/ref/Pxp_document.document.html#2_WritingdocumentsasXMLtext

>
> I think I am going to start with the Printf module. I wonder how well
> it handles utf8 for example.

UTF-8 are just bytes for printf.

> And I'll have to write a kind of xml_encode function. I am pretty sure
> it has already be done somewhere !

let xml_encode =
Netencoding.Html.encode
~in_enc:`Enc_utf8
~out_enc:`Enc_usascii
~prefer_names:false
()

That would assume the input is UTF-8 encoded, and the output is
ASCII-encoded. You can control which ASCII characters get the special
XML representation &...; with the unsafe_chars optional argument.
Docs are at
http://projects.camlcity.org/projects/dl/ocamlnet-2.2.9/doc/html-main/Netencoding.Html.html

Gerd
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[Michaël Le Barbier]

Le 17 mars 09 à 12:01, Rémi Dewitte a écrit :

I am also very interesting in this question. Besides Gerd's
suggestion, is there a solution that can help writing SGML-ish thingies?

Maybe the Eiom library (part of the OCsigen project) can also interest
you, although I never used it and that it might be focused on HTML.
--
Cheers,
Michaël

[Sylvain Le Gall]

On 17-03-2009, Rémi Dewitte <re...@gide.net> wrote:
>
> I think I am going to start with the Printf module. I wonder how well it
> handles utf8 for example. And I'll have to write a kind of xml_encode
> function. I am pretty sure it has already be done somewhere !
>

Maybe it is a bit overkilling, but there is also ocamlduce.

See there:
http://www.cduce.org/ocaml
(dev for ocaml 3.11:)
http://ocamlduce.forge.ocamlcore.org/
http://git.ocamlcore.org/cgi-bin/gitweb.cgi?p=ocamlduce/ocamlduce.git;a=summary

OCamlduce can also be used with Eliom/OCsigen.

AFAIK, using ocamlduce can help you to type check your output tree
directly within OCaml compiler...

Regards
Sylvain Le Gall

[Matthieu Wipliez]

Yet another solution is Xmlm by Daniel Bünzli.

http://erratique.ch/software/xmlm

This is probably the easiest and lightweight solution: Xmlm comes as a single module and its interface, and it's BSD so you can just copy/paste it into your project.

Cheers,
Matthieu

----- Message d'origine ----
> De : Sylvain Le Gall <syl...@le-gall.net>
> À : caml...@inria.fr
> Envoyé le : Mardi, 17 Mars 2009, 13h53mn 30s
> Objet : [Caml-list] Re: XML output

[Rémi Dewitte]

Thanks every one !

I guess I have to pick the one now :)

Rémi

[Michael Ekstrand]

Matthieu Wipliez <mwip...@yahoo.fr> writes:
> Yet another solution is Xmlm by Daniel Bünzli.
>
> http://erratique.ch/software/xmlm
>
> This is probably the easiest and lightweight solution: Xmlm comes as a
> single module and its interface, and it's BSD so you can just
> copy/paste it into your project.

I second the xmlm suggestion. Polling event-based parsing is very slick
and maps well into the functional paradigm, and its XML writing support
(generating a stream of events identical to those you read) makes
generation quite intuitive and reliable.

- Michael

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