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https://issues.apache.org/jira/browse/TAP5-171?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12647414#action_12647414
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Howard M. Lewis Ship commented on TAP5-171:
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Is this necessary given that we only expect templates to be well-formed, not
valid?
> Consider checking for org.xml.sax.ext.Attributes2
> -------------------------------------------------
>
> Key: TAP5-171
> URL: https://issues.apache.org/jira/browse/TAP5-171
> Project: Tapestry 5
> Issue Type: Improvement
> Environment: Sun JDK 1.5
> Reporter: Folke Behrens
> Priority: Trivial
>
> Consider testing for org.xml.sax.ext.Attributes2 and use
> Attributes2.isSpecified(int) to check if the attribute is really specified or
> just a default declaration.
> With this you can e.g. test if <a shape="rect" > is really set. Test for
> "http://xml.org/sax/features/use-attributes2"; or just use "instanceof":
> if (attributes instanceof Attributes2) {
> if (( (Attributes2)attributes ).isSpecified(i)) {
> // do something
> }
> }
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