|Parents||item | rule|
|Description||Indicates a set of possible choices for a phrase in a rule expansion.|
<!ELEMENT one-of (item)* > <!ATTLIST one-of xml:lang NMTOKEN #IMPLIED >
xml:lang : NMTOKEN
Specifies the spoken language used with this element - for example, en-US for US English.
Each choice within a one-of element is represented by an item element containing a rule expansion.
In Example 3-41, the rule uses the one-of elements to accept either "like" or "hate" and either "dogs" or "cats." Hence it will match the following phrases: ...