The @conref attribute
The value of the @conref attribute must be a URI reference to a DITA element. See URI-based (direct) addressing for details on specifying URI references to DITA elements. As with other DITA references, a @conref attribute that references a resource without an ID is treated as a reference to the first topic or map in the document.
<ph conref="#topic/ph">Something</ph>the word "Something" will be replaced by the content of the referenced <ph> element.