I cannot find a way to define an element so that it contains sub
elements in any order but only 1 of each.
I have tried a sequence of but then the order matters
I have tried a choice of 0 or more but then I can add an element in
twice.
Here is what I have tried so far
<!ELEMENT fields (type?, expiry_date?, ccmy?, commodity_name?,
exchange_symbol?, notice_date?, related_option?, action_ptr?,
double_quote_to?, double_quote_from?, retransmission?, active_index?,
title?)>
<!ELEMENT fields (type | expiry_date | ccmy | commodity_name |
exchange_symbol | notice_date | related_option | action_ptr |
double_quote_to | double_quote_from | retransmission | active_index |
title)*>
So in <fieldsI want 0 or 1 of each field but I dont want to specifiy
an order for the elements in <fields>. Is this possible in a dtd
definition.
This has to be a dtd too, our xml library doesnt support schemas and
cannot be changed.
Adrian
3  1723 
Hi Adrian,
No, that is not possible in a DTD. You need to either constrain the
model to a specific order as in your sequence case or define a more
relaxed model and enforce the constraints at application level.
Best Regards,
George
---------------------------------------------------------------------
George Cristian Bina
<oXygen/XML Editor, Schema Editor and XSLT Editor/Debugger http://www.oxygenxml.com
On Mar 26, 6:40 pm, "Adrian" <n...@bluedreamer.comwrote:
I cannot find a way to define an element so that it contains sub
elements in any order but only 1 of each.
I have tried a sequence of but then the order matters
I have tried a choice of 0 or more but then I can add an element in
twice.
Here is what I have tried so far
<!ELEMENT fields (type?, expiry_date?, ccmy?, commodity_name?,
exchange_symbol?, notice_date?, related_option?, action_ptr?,
double_quote_to?, double_quote_from?, retransmission?, active_index?,
title?)>
<!ELEMENT fields (type | expiry_date | ccmy | commodity_name |
exchange_symbol | notice_date | related_option | action_ptr |
double_quote_to | double_quote_from | retransmission | active_index |
title)*>
So in <fieldsI want 0 or 1 of each field but I dont want to specifiy
an order for the elements in <fields>. Is this possible in a dtd
definition.
This has to be a dtd too, our xml library doesnt support schemas and
cannot be changed.
Adrian
On Mar 27, 1:24 am, "George Bina" <geo...@oxygenxml.comwrote:
Hi Adrian,
No, that is not possible in a DTD. You need to either constrain the
model to a specific order as in your sequence case or define a more
relaxed model and enforce the constraints at application level.
- Show quoted text -
Thanks George. I just assumed it was possible in the DTD.
Adrian wrote:
On Mar 27, 1:24 am, "George Bina" <geo...@oxygenxml.comwrote:
>Hi Adrian,
No, that is not possible in a DTD. You need to either constrain the
model to a specific order as in your sequence case or define a more
relaxed model and enforce the constraints at application level.
- Show quoted text -
Thanks George. I just assumed it was possible in the DTD.
It *is* possible in a DTD, but only when using SGML, not XML.
///Peter
--
XML FAQ: http://xml.silmaril.ie/ This thread has been closed and replies have been disabled. Please start a new discussion. Similar topics
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