[XML-DEV Mailing List Archive Home] [By Thread] [By Date] [Recent Entries] [Reply To This Message]

Re: List of possible choices in a DTD

• From: "Rick Jelliffe" <ricko@a...>
• To: "Ingo Macherius" <Ingo.Macherius@T...>, <xml-dev@i...>
• Date: Tue, 11 Nov 1997 01:13:24 +1100

Is this what you are asking?

USING ELEMENT TYPES
-------------------

In standard SGML you can select days using parameter 
entities like this:

<!ENTITY % days  " ( sunday | monday | tuesday | wednesday | thursday |
	friday | saturday ) " >
<!ELEMENT day-choice  %days; >
<!ELEMENT %days;  EMPTY >


In XML, I think you may have to give a different ELEMENT declaration
for each day (I cannot remember what was decided, sorry.

USING ATTRIBUTES
----------------

<!ENTITY % days  " ( sunday | monday | tuesday | wednesday | thursday |
	friday | saturday ) " >
<!ELEMENT day-choice EMPTY>
<!ATTLIST day-choice
	day  %days;  #REQUIRED >

Again, in XML I think you may have to dereference the entity yourself.
(Even if you don't, it is probably good practise since parameter entities
will not be the first things implemented in beta XML parsers.)

<!ELEMENT day-choice EMPTY>
<!ATTLIST day-choice
	day  ( sunday | monday | tuesday | wednesday | thursday |
	friday | saturday ) #REQUIRED >


Rick Jelliffe


xml-dev: A list for W3C XML Developers. To post, mailto:xml-dev@i...
Archived as: http://www.lists.ic.ac.uk/hypermail/xml-dev/
To (un)subscribe, mailto:majordomo@i... the following message;
(un)subscribe xml-dev
To subscribe to the digests, mailto:majordomo@i... the following message;
subscribe xml-dev-digest
List coordinator, Henry Rzepa (mailto:rzepa@i...)

• Prev by Date: XML product survey
• Next by Date: Escaping in entities
• Previous by thread: Re: List of possible choices in a DTD
• Next by thread: XML product survey
• Index(es):
  • Date
  • Thread