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[xsl] function access to tunneled parameters

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Hi,

In future XSLT versions, could xsl:functions be allowed to also declare tunnel parameters that would not be provided on function call but that the function could retrieve directly from the tunnel?

Declaring the same function with the same parameter set as tunnel="no" (default) would simply provide a different function signature with one more (non-tunneled) expected parameter.

This would provide functions with access to tunneled parameters, avoiding having templates retrieve tunneled parameters just to pass them explicitly and then from function to function as a (non-tunneled) parameters that may only get used at the end of the call line, all the while maintaining function signature consistency.

Thank you,
ac

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