OSID - osid.search.terms.HeadingRangeTerm Service Interface Definition

Interface	osid.search.terms.HeadingRangeTerm
Implements	`osid.search.QueryTerm`
Description	A term for a `Heading` range query.
Method	getHeadingRangeStart
Description	Gets the start of the `Heading` range in this term.
Return	`osid.mapping.Heading`	the heading start
Errors	ILLEGAL_STATE	`isWildcard()` is `true`
Compliance	`mandatory`	This method must be implemented.
Method	getHeadingRangeEnd
Description	Gets the end of the `Heading` range in this term.
Return	`osid.mapping.Heading`	the heading end
Errors	ILLEGAL_STATE	`isWildcard()` is `true`
Compliance	`mandatory`	This method must be implemented.