SQL Server 2005 and higher supports full-text queries against a table's plain character data. PowerDesigner supports this feature through the full text catalog and full text index objects.
Full-Text Catalogs (SQL Server)
A full-text catalog contains zero or more full-text indexes. PowerDesigner models full-text catalogs as extended objects with a stereotype of <<FullTextCatalog>>.
Full-Text Indexes (SQL Server)
A full-text index stores information about significant words and their location within a given column. This information is used to quickly compute full-text queries that search for rows with particular words or combinations of words. PowerDesigner models full-text indexes as table indexes with an index type set to "Full Text".