MicroStation supports various links to individual elements using the Add Link to Element tool.

See the MicroStation help for details on the operation of this tool. OpenCities Map supports these links in Oracle Spatial projects by storing the value of the link in a column specifically designated for the element link. This column is defined using OpenCities Geospatial Administrator. When a feature with a link is posted to Oracle, the value of the link is stored in the designated column. When a feature is queried from Oracle, it is recreated with the link stored in the specified column.