Gets the description of a link of a document.
GET /documents/<documentID>/links/<linkID>
Response type: application/xml or application/json
Response body: a link described as follows:
GET /documents/7738/links/L6
<link dataType="String" qualification="Dimension"> <id>L6</id> <name>Year</name> <description>Year 2003 - 2006.</description> <dataSourceObjectId>DS0.DObc</dataSourceObjectId> <formulaLanguageId>[Year]</formulaLanguageId> <linkedExpressions> <linkedExpression id="DP0.DObc"/> <linkedExpression id="DP1.DObc"/> </linkedExpressions> </link>