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clarification on Eduardo Cobian question  RSS feed

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on question 2 .
the question is
What are correct statements about creating scripting variables for a Tag::
1) It is necessary to implement TagExtraInfo interface.
2) You have to insert into the tag element of the taglib descriptor file an entry for tei-class element.
3) The interface you have to implement has a method called getVariableInfo.
4) None of the previous.
And the answer are 1 2 and 3.
But this class "TagExtraInfo" is optional.As quoting form API
"Optional class provided by the tag library author to describe additional translation-time information not described in the TLD"
Can some one comment on this pls.I am new to Tag library.
[This message has been edited by james edwin (edited November 29, 2001).]
Consider Paul's rocket mass heater.
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