Power Manager processes the Liberty files to read the standard cell, special cell, and macro cell model definitions and stores them in an OA-based proprietary database. This avoids the need to reprocess the Liberty files every time a command is executed. Such a database is called Model Library database (MLDB). You can specify the MLDB library on the Libraries tab.
MLDB reads and stores the PG pins, pins, and the non-characterized attributes for the various cell models provided through Liberty files. These attributes are saved in a different library than the design or PDK library, which can be utilized in various projects to extract details instead of parsing the Liberty files every time.