The following is a list of the names that are always available to TALES expressions in Zope, and which you may often see in your page templates. These are considered reserved words. You can read more about these here: http://wiki.zope.org/ZPT/TALESSpecification13.
nothing
—a special value used to represent a non-value (for example,void, None, Nil, NULL
).default
—a special name for the contents (data) of a tag. This is usually only used in tricky bits of code.options
—the keyword arguments passed to a template. These are generally available when a template is called from methods and scripts, rather than from the Web.repeat
—the repeat variables. See thetal:repeat
documentation.attrs
—a dictionary containing the initial values of the attributes of the current statement tag. This is Uncommon.here
orcontext
—the object to which the template is being applied.request
—the publishing request...