Re: omf files that dont validate

[James Henstridge <james daa com au>]

Malcolm Tredinnick wrote:

> Now, I can sympathise with an argument that says the current DTD is a
> little inflexible in that it requires the fields to be in a particular
> order. Since the data in an OMF file is really just a bag of items, we
> should probably allow the tags in any order and that's a backwards
> compatible change to the DTD that ships with scrollkeeper. File a bug
> against scrollkeeper (at sourceforge) to get remind me to look at that
> if you like.
>  
The DTD probably requires the ordering so that it can impose limits on 
the number of each element type that can be included.  If you wanted to 
get rid of the ordering constraint, you need to use something like 
(a|b|c|d)* instead of (a,b,c,d), which doesn't protect you against 
unwanted repeating elements (eg. it might let an OMF file through with 
multiple series ids or something).  To get the desired validation 
behaviour, you would need schemas or relax-ng.

James.

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