December 2003
Intermediate to advanced
764 pages
24h 58m
English
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Generating a DOCTYPE Declaration
Because the page in Example 17-10 generates an XHTML
response, the response body should start with a DOCTYPE declaration
for XHTML. This is not a JSP specification requirement, but for XML
documents defined by a DTD or an XML Schema, it’s
always a good idea. The <jsp-output> action
with the doctype-root-element,
doctype-public, and
doctype-system attributes adds a DOCTYPE
declaration based on the attribute values at the top of the response
body. With the attribute values used in Example 17-10,
the generated declaration looks like this:
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3c.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
The doctype-public attribute is optional. If you
omit it, the action generates a declaration without a public
identifier.
Note that if you include a DOCTYPE declaration that specifies a DTD in the JSP Document itself, it applies to the JSP Document, not to the generated response. In this case, the container validates the JSP Document against the specified DTD.
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