Exploring Link Sets in Explorer
A link set is a group of links to files, models, references, saved views, and supporting documentation. Link sets can be viewed in the Links tab of the Explorer dialog. The link set's name appears next to the Link Set icon.
A link set can contain links to DGN and DWG files; design, drawing, and sheet models; folders, references, saved views, and drawing boundaries.
Each link set is an independent object stored as non-graphical data in a DGN file or in a DGN library (DGNLib). If you move a DGN file with link sets stored in it, the link sets move with the DGN file and retain their links to the target files.