Lists Home |
Date Index |
- From: Peter@ursus.demon.co.uk (Peter Murray-Rust)
- To: firstname.lastname@example.org
- Date: Thu, 10 Apr 1997 08:43:24 GMT
This sounds exactly what is needed but the bad news is that
I know nothing about architectural forms. I suspect this is true for
some other readers of this list as well. I would be grateful for any pointers
(and brief explanations here if possible.) Here are some very naive
- are AFs part of HyTime or more generally part of SGML?
- does XML support AFs without further revisison?
- if not, what has to be added? or is it possible to build this
into tools without breaking the spec?
- if tools have to be built, is the processing required at
- do the components belonging to different DTDs have to live in
separate files or can they be separated within a single
file (e.g. by NOTATIONs)?
- if someone decides they need AFs are they easy to implement?
(for my requirements it looks like an aliasing mechanism
In message <199704100019.UAA00272@localhost> David Megginson writes:
> Peter Murray-Rust writes:
> > The major problem is namespace collisions between ElementTypes.
> > Does anyone have a solution? What if the incompatible document is
> > in a separate valid document (i.e. with DOCTYPE). I'd value
> > ideas/epxerience here, otherwise we will have to produce some
> > kludge.
> The solution is to define tables (etc.) as base architectures, and
> then to map specific DTDs using architectural forms, something like
> <?ArcBase xmlTable>
> [notation and entity declarations omitted]
> <!ELEMENT table (tr+)>
> <!ATTLIST table
> xmlTable #FIXED "xmlTable">
> <!ELEMENT tr (tc+)>
> <!ATTLIST tr
> xmlTable #FIXED "xmlTableRow">
> <!ELEMENT tc (#PCDATA)>
> <!ATTLIST tc
> xmlTable #FIXED "xmlTableCell">
> Presto -- no element-type-name collisions!
I'm assuming that you are taking HTML3.2 as an example (I'm happy with
that :-). If so, which document does the above occur in? I can see that
it might alias a 'foreign' DTD's TABLE to xmlTable but what if there is
another DTD with TABLE in. Or does the ArcBase PI imply a scope for the
declarations which only exists in a small region. (If so this is clearly
something the parser has to resolve).
If I'm on the right track, what do the parser authors think about
implementing AFs? Is it a lot of work?
Peter Murray-Rust, domestic net connection
Virtual School of Molecular Sciences
xml-dev: A list for W3C XML Developers
Archived as: http://www.lists.ic.ac.uk/hypermail/xml-dev/
To unsubscribe, send to email@example.com the following message;
List coordinator, Henry Rzepa (firstname.lastname@example.org)