On Wed, 1 Dec 2004 21:57:06 +0100, "Ekim" <the.newsletter@g...>
wrote:

>I wanna create a new DTD for a protocol - therefore I have one question:
>is there a way to define elements depending on a special attribute-value?
>I guess I've confused you so far, so that's what I really mean:
>
>I have got an element "sensor":
><!ELEMENT sensor ((longitude, latitude) | (direction, speed))>
>
>This element has an attribute "type":
><!ATTLIST sensor type (GPS | WIND) "GPS">
>
>My question now is, if it is possible that the sub-elements of "sensor" are
>"longitude, latitude" only in the case when the type-attribute = "GPS".
>When the type-attribute = "WIND", the sub-elements shall exactly be
>"direction, speed".

No. An attribute specification can not be directly used to specify the
content model of an element that the attribute belongs to.

Chose a different approach to your problem. (Architectural processing
comes to mind but I have not investigated that approach any further at
this time)

-- 
Rex