Question on DTD

[Rohit Poddar]

Element web-app is defined as :
<!ELEMENT web-app (icon?, display-name?, description?, distributable?, context-param*, filter*, filter-mapping*, listener*, servlet*, servlet-mapping*, session-config?,
mime-mapping*, welcome-file-list?, error-page*, taglib*,
resource-env-ref*, resource-ref*, security-constraint*, login-config?, security-role*,
env-entry*, ejb-ref*, ejb-local-ref*)>
As you see it says the context-param comes before filter but as you go down in dtd they have defined filter before context-param. Please help me understand this.
Thanks,
Rohit

[Paul Anilprem]

Order is not important.
------------------
SCJP2, SCWCD Resources, Free Question A Day, Mock Exam Results and More!
www.jdiscuss.com
Get Certified, Guaranteed!
JQPlus - For SCJP2
JWebPlus - For SCWCD
JDevPlus - For SCJD

[Tim Duncan]

Originally posted by Paul Anil:
Order is not important.

I think that deserves a bit more explanation.
The context-param and filter sections in the DTD can be in any order, however ...
The DTD does require that context-param comes before filter in the deployment descriptor (i.e. the XML file).

[Paul Anilprem]

You're correct. I should've explained that

[Rohit Poddar]

Thank you Tim and Paul,
I have a few more questions....
1) Is there anything specified in the DTD or in the Servlet specification that context comes before filter?
2) Are there any more of such restrictions, as to which element comes before any other element?
Thanks,
Rohit

[Tim Duncan]

Originally posted by Rohit Poddar:

2) Are there any more of such restrictions, as to which element comes before any other element?

Yes, it's all in the DTD Specification . The specification for <web-app> ...
<!ELEMENT web-app (icon?, display-name?, description?, distributable?, context-param*, filter*, filter-mapping*, listener*, servlet*, servlet-mapping*, session-config?,
mime-mapping*, welcome-file-list?, error-page*, taglib*,
resource-env-ref*, resource-ref*, security-constraint*, login-config?, security-role*,
env-entry*, ejb-ref*, ejb-local-ref*)>
tells you what other elements can occur inside <web-app>. A question mark indicates that the item is optional, and a star means zero-or-more occurrences, however the elements (where they appear) must occur in the order given (indicated by the commas).
Hope that answers your question.

[JiaPei Jen]

Does SCWCD test <web-app> only? Or the test may cover other DTDs? Would anybody shed light on this question?

[Tim Duncan]

Originally posted by JiaPei Jen:
Does SCWCD test <web-app> only? Or the test may cover other DTDs? Would anybody shed light on this question?

Section 12 requires knowledge of Tag Library Descriptors