I clearly missed the pipe bit in the manual.
That's at Template::Manual::Directives, under FILTER.
Can you double pipe, to html and html_para, say?
That wouldn't make sense, because once you've inserted the P tags, you'll end up escaping the angle brackets. Ouch. But yes, you can double pipe for things like filename to href params versus filename to html: 
<a href = "[% filename | uri | html %]">[% filename | html %]</a>

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In reply to Re^3: Template Toolkit filtering all variables by merlyn
in thread Template Toolkit filtering all variables by marvell

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