Returns an array which contains the PT_PROPIDS constant describing the contents of each column. For example, if a call to IPTQueryResult.Data returned an array with two columns containing Object ID and Name, then a call to Columns would return an array with two elements: PT_PROPID_OBJECTID and PT_PROPID_NAME.
The array of PT_PROPIDS values corresponding to the internal columns
IPTQueryResult Interface | com.plumtree.server Namespace | PT_PROPIDS