The <boolean> element was deprecated in DITA version 1.1. It was originally intended to express one of two opposite values, such as yes / no or on / off.
This element is deprecated. It is functionally equivalent to
<state value="yes|no"/>, which is recommended as its replacement in all cases.
See appendix for information about this element in OASIS document type shells.
She said "<boolean state="yes"/>" when I asked her to marry me!
- @state (REQUIRED)
- The state of the <boolean> element. Allowable values are "yes", "no", and "-dita-use-conref-target".