textdata — Pointer to external text data
This element points to an external entity containing text to be inserted.
Any markup in the text identified with textdata
will be escaped. In other words, this element is for inserting things
like program listings, not parts of an XML document. To break a document
into separate physical files, use entities.
May be formatted inline or as a displayed block, depending on context. Insert the text.
There are two ways to provide content for textdata
:
entityref
or fileref
. It is best to use only one of these
methods, however, if multiple sources are provided,
entityref
will be used in favor of
fileref
.