[ZDP] BackTalk to Document The Zope Book (2.5 Edition)/Dynamic Content with DTML
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Sat, 21 Sep 2002 20:51:52 -0400
A comment to the paragraph below was recently added via http://www.zope.org/Documentation/Books/ZopeBook/current/DTML.stx#2-78
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As with the *var* tag, you can use both name syntax and expression
syntax. Here are some conditions expressed as DTML expressions.
expr="1" -- Always true.
expr="rhino" -- True if the rhino variable is true.
expr="x < 5" -- True if x is less than 5.
expr="objectValues('File')" -- True if calling the *objectValues*
method with an argument of *File* returns a true value. This
method is explained in more detail in this chapter.
% Anonymous User - Sep. 21, 2002 8:51 pm:
Nonexistence in the if-tag: name syntax: falsehood, expr syntax: not found exception.