Step 1 is to create the attribute domain declaration as follows.
First, create a file named "phase-of-moonAttDomain.ent
".
moonPhasePropsDomain.ent
", create these two declarations: <!ENTITY % phase-of-moon-d-attribute "phase-of-moon CDATA #IMPLIED " > <!ENTITY phase-of-moon-d-att "a(props phase-of-moon)" >
The first declaration declares the @phase-of-moon
attribute and puts it in a parameter entity so we can add it to the DITA-defined %selection-atts;
parameter entity via the %props-attribute-extensions;
configuration parameter entity in document type shells.
The second declaration is the domain declaration string for the attribute domain. It will be added to the value of the @domains
attribute declared for each topic or map element type. In the value, the "props" keyword indicates that the attribute is a @props
attribute specialization and not a @base
attribute specialization.
You should of course add an appropriate descriptive header to the file as well as a little documentation for the attribute itself.
This is all that is required for the attribute domain module (there is no separate .mod file, as there is for element domains).