(19,701 bytes)Database DefinitionsStores field definition information including mapping of ACT! field names to ACT! database schema names, index file structures, and references to drop-down list items in the Binary Large Object Database file
Digital Distribution Frame is a frame at which interconnections are made between the digital output of some equipment and the digital input of other equipment
Data Descriptive File - This is the file name extension used for the multiple files stored in a single USGS SDTS transfer tar gz archive such as for a DEM or DLG