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%META:TOPICINFO{author="ProjectContributor" date="1231502400" format="1.1" version="1"}%
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%META:TOPICPARENT{name="Macros"}%
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You can write =%<nop>ADDTOHEAD{...}%= in a topic or template. This variable accepts the following parameters:
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* =_DEFAULT= optional, id of the head block. Used to generate a comment in the output HTML.
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* =text= optional, text to use for the head block. Mutually exclusive with =topic=.
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* =topic= optional, full Foswiki path name of a topic that contains the full text to use for the head block. Mutually exclusive with =text=. Example: =topic="%WEB%.MyTopic"=.
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* =requires= optional, comma-separated list of id's of other head blocks this one depends on.
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=%<nop>ADDTOHEAD%= expands in-place to the empty string, unless there is an error in which case the variable expands to an error string.
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Use =%<nop>RENDERHEAD%= to generate the sorted head tags.