Right Quote Character - specify the right quote character.Left Quote Character - specify the left quote character.Quote Tables - enable to use specific quote characters to quote tables. Use Connection String - select this option then click Build to open the Data Link Properties dialog to rebuild the connection string to a database for the mapping of components' parameters. The information specified in a connection string may vary depending on the specified OLE DB provider.If you want to use a data link file as the source of connection to a database, select this option then click Browse to open the Select Data Link File dialog or use the drop-down to search for the desired. udl extension, referred to as a Microsoft Data Link file. Download CAD models for millions of electronic components, including schematic symbols, PCB footprints, and 3D models. Use the Catalog Browser to edit the catalog database, or use a database program that can read/write the Access file format. Use Data Link File - a connection string is a string version of the connection information to a database and can be saved as a separate file with a.The Database Connection dialog is accessed by clicking Tools » Database Connection in the Database Editor (. The Database Connection dialog provides controls to link projects to a database library.