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How can I tell when I need to quote a tag inside a tag?

In general, you don't need to quote the following tags which are interpreted first within a list:

    [item-code] [item-data ...] [item-field ...] etc.
    [loop-code] [loop-data ...] [loop-field ...] etc.
    [foo-code]  [foo-data ...]   [foo-field ...] etc.

This is because they are interpreted as a part of the surrounding [loop], [item-list], [search-list], [sql list], or [tag each table] constructs.

So this will work:

    [item-list]
    [page [item-field url]]detailed info[/page] on [item-description]
    [/item-list]

This will not work:

    [page [value mypage]]

The [value ...] tag is not interpolated before page, and the parser will not know to do so. It needs to be instead:

    [page href="[value mypage]"]

Clear as mud, right? Well, at least if you quote them all you can't go wrong. 8-)

You might wonder why unquoted tags are even allowed. The answer is performance; if you have large lists of tags you can achieve significant speedups by using positional parameters. It requires CPU power to parse and disassemble the named parameters.

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