RE: [flexcoders] DTD Schema for Flex 2

[Roger Gonzalez]

To provide a little more detail, the problem is:   1) MXML imposes ADDITIONAL constraints above and beyond what can be expressed in DTD or XSD. 2) MXML is open-ended, and the rules for how new namespaces tie together cannot be expressed in DTD or XSD.   For example, lets say we did provide the schema, like we did for 1.x.  Unfortunately, for any non-toy application, you'll be writing new components.  So, lets say you write a new component, and its in the yourcompany.whatever.* namespace.  The base of your component is VBox.  That's nice.  In order to make the XML tools happy, YOU need to write the schema for yourcompany.whatever.*.  You might be able to extend our schema (which if you've ever tried it you'll know what a pain this is)  But anyway, lets say you go and write that schema.  And then you decide to extend HBox instead.  Oops.  Go rewrite that schema.    At some point you say, hey, gosh it would be really nice if I just had a smart tool that could generate that schema for me.  It seems like there should be some way of parsing the tags such that you know what the subset of child tags and attributes will be legal for a given base class, and you could then generate the appropriate schema for that class.   But then BING a lightbulb goes off in your head, and you realize that the entire notion of trying to enter code that follows a schema at the same time you're writing the code that will modify the schema is sort of a losing proposition.  It only works if you assume that most of your classes are never going to change, which is silly.   Thats when you say, "hey, what I really need is an MXML-aware tool that knows ALL the rules of the language".  And you look around, and hey, look, there's FlexBuilder!   -rg   From: flexcoders@yahoogroups.com [mailto:[EMAIL PROTECTED] On Behalf Of Gordon Smith Sent: Thursday, June 15, 2006 2:16 PM To: flexcoders@yahoogroups.com Subject: RE: [flexcoders] DTD Schema for Flex 2 That's not true. - Gordon From: flexcoders@yahoogroups.com [mailto:flexcoders@yahoogroups.com] On Behalf Of Daniel Tuppeny Sent: Thursday, June 15, 2006 6:01 AM To: flexcoders@yahoogroups.com Subject: RE: [flexcoders] DTD Schema for Flex 2 I'm confused too. If it's XML (which I assume it is, because it has xml tags and namespaces!), then why can't they write a DTD? If there's anything in their that wouldn't fit into a DTD, then surely it's not valid XML either? From: flexcoders@yahoogroups.com [mailto:flexcoders@yahoogroups.com] On Behalf Of Michael Schmalle Sent: 15 June 2006 12:55 To: flexcoders@yahoogroups.com Subject: Re: [flexcoders] DTD Schema for Flex 2 Becasue it's a namespace, that is the point ;-) It's arbituary and a way to seperate <mx> component names for <my> component names. It's like finding out majik isn't real huh... :( HAHAHA Peace, Mike On 6/15/06, Tom Chiverton <[EMAIL PROTECTED]> wrote: On Thursday 15 June 2006 12:13, Gareth Edwards wrote: > Flex 2.0 isn't compatible with a DTD Schema. Bwuh ! So why do all the examples assign a namespace / include <xml> tags ? -- Tom Chiverton **************************************************** This email is sent for and on behalf of Halliwells LLP. 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