wrote:
> For HTML attributes that don't have an explicit value (such as the
> SELECTED attribute in OPTION) the keyword argument to the function must
> have the value True
>
A better way to do this (given that HTML defines exactly which attributes
do not take a value) is to use the attribute name and simply generate the
attribute only if the value is non-false.
>From Zope's TAL parser:
BOOLEAN_HTML_ATTRS = [
# List of Boolean attributes in HTML that may be given in
# minimized form (e.g. <img ismap> rather than <img ismap="">)
# From http://www.w3.org/TR/xhtml1/#guidelines (C.10)
"compact", "nowrap", "ismap", "declare", "noshade", "checked",
"disabled", "readonly", "multiple", "selected", "noresize",
"defer"
]
EMPTY_HTML_TAGS = [
# List of HTML tags with an empty content model; these are
# rendered in minimized form, e.g. <img />.
# From http://www.w3.org/TR/xhtml1/#dtds
"base", "meta", "link", "hr", "br", "param", "img", "area",
"input", "col", "basefont", "isindex", "frame",
]
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