- From: Costello, Roger L. <costello@mitre.org>
- Date: Sun, 7 Jun 2009 07:51:32 -0400
- To: "xmlschema-dev@w3.org" <xmlschema-dev@w3.org>
Hi Folks,
When declaring open content, the "amount" of openness is determined by the value of the mode attribute:
<openContent mode="_____">
...
</openContent>
Here is the order of openness:
interleave is greater than suffix is greater than none
Thus, there are only two rules to remember regarding a subtype and its parent type:
Derive-by-extension: a subtype cannot
specify openness that is less than its
parent's openness.
Derive-by-restriction: a subtype cannot
specify openness that is greater than its
parent's openness.
Do you agree?
/Roger
Received on Sunday, 7 June 2009 11:52:05 UTC