Re: [boost] RFC: Boost.XML API prototype in the sandbox ->generation form xsd

From: Oliver.Kowalke_at_[hidden]
Date: 2007-07-13 00:47:48

> > I would do it over templates - than it's type safe and a 
> part of the 
> > xml validation can be done at compile time.
> >
> > typedef tag<
> >         mpl::vector< title, author >    // tags
> >         mpl::vector< isbn > // atributes
> > >       article_info;
> 
> 
> I hadn't considered compile-time type safety when I wrote my 
> above example.
> However, I feel an example like this might also preclude XML 
> features like comments. If we were to parse an existing article:
> 
>   <article_info isbn="foo">
>       <!--Article information goes here-->
>       <title>bar</title>
>       <author>Testy McTest</author>
>   </article_info>
> 
> your definition doesn't immediately make it clear that the 
> comment, when parsed, ends up in the document tree. I may, 
> however, just be missing something. Complicating matters, 
> according to the standard, they can also appear within the 
> document type declaration, so comments significantly 
> complicate the matter:
> http://www.w3.org/TR/REC-xml/#sec-prolog-dtd
> 
> And the standard also lists retrieval of comment text as optional:
> http://www.w3.org/TR/REC-xml/#sec-comments
> 
> But I think that a Boost.XML library should support the 
> retrieval of the text of comments.

I believe that comments could be supported with a typesafe
implementation.
I don't know where you see problems with comments - article_info could
contain optional instances of comment-class.

Oliver