The <apiSyntaxText> element provides the representation in the programming language for the declared interface for the API item.
In the <apiDef> element, the <apiSyntaxText> element can supplement or replace the semantic declaration of the same interface. When a specialization provides a complete representation of the interface within a specialized <apiDef> element, the <apiSyntaxText> element can be omitted. The Java DITA API reference takes this approach.
<apiClassifier id="rational.xde" outputclass="statement" platform="vb">
<apiName>TestImplements</apiName>
<shortdesc>Specifies one or more interfaces or interface members.</shortdesc>
<apiClassifierDetail>
<apiSyntax platform="vb">
<apiSyntaxText>Implements <apiItemName>IRXEAbstraction</apiItemName> <apiItemName>TestImplements</apiItemName>[, …]<apiRelation
</apiSyntaxText>
<apiSyntaxItem>
<apiItemName>IRXEAbstraction</apiItemName>
<apiDefNote>Required. An interface whose properties, methods, and events will be
implemented by corresponding members in the class or structure.</apiDefNote>
</apiSyntaxItem>
<apiSyntaxItem>
<apiItemName>TestImplements</apiItemName>
<apiDefNote>Required. The member of an interface that is being implemented.</apiDefNote>
</apiSyntaxItem>
</apiSyntax>
<apiDesc>...</apiDesc>
</apiClassifier>
apiData, apiItemName, apiname, apiRelation, apiType, cmdname, draft-comment, fn, indexterm, indextermref, keyword, msgnum, option, parmname, required-cleanup, varname, wintitle
(text data or apiRelation or apiType or apiItemName or apiData or keyword or option or parmname or apiname or cmdname or msgnum or varname or wintitle or draft-comment or required-cleanup or fn or indextermref or indexterm) (any number)