XFA Specification
Chapter 25, Rich Text Reference
Version Specification
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The intent of these attributes is to provide a way for:
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Correlating updates to this specification with the software that processes the rich text
Allowing future revisions of the software to apply special processing to the rich text that was produced
by earlier releases of the software
Both attributes take version identifiers as values.
xfa:APIVersion
A concatenation of numeric fields that specify the version of the software used to produce the enclosing
rich text. Numeric fields are separated from one another with periods, and each numeric field contains a
whole number. The larger the number, the more recent the version. The further left the field, the more
significant it is.
When comparing two version identifiers, if one identifier has fewer fields than the other, the one with
fewer fields must be extended by padding it on the right with fields containing “0”.
The syntax of
xfa:APIVersion
is
xfa:APIVersion=releaseID
where
releaseID
is a version identifier representing the version of the software that produced the
document.
If the
xfa:APIVersion
attribute is omitted from rich text, it should be assumed that the application
producing the rich text has used markup attributes that correspond to the latest revision of this
specification (XFA
Specification).
The features described by this specification are supported by Adobe XFA rich text processing software
bearing an
xfa:APIVersion
attribute of "2.4.5277.0" or later.
xfa:spec
The version of the XFA specification to which the rich text string complies.
spec=revisionID