The TIGER/Line shapefiles and related database files (.dbf) are an extract of selected geographic and cartographic information from the U.S. Census Bureau's Master Address File / Topologically Integrated Geographic Encoding and Referencing (MAF/TIGER) Database (MTDB). The MTDB represents a seamless national file with no overlaps or gaps between parts, however, each TIGER/Line shapefile is designed to stand alone as an independent data set, or they can be combined to cover the entire nation.

                             The Address Ranges Relationship File (ADDR.dbf) contains the attributes of each address range.  Each address range applies to a single
                             edge and has a unique address range identifier (ARID) value.  The edge to which an address range applies can be determined by linking
                             the address range to the All Lines Shapefile (EDGES.shp) using the permanent topological edge identifier (TLID) attribute.  Multiple
                             address ranges can apply to the same edge since an edge can have multiple address ranges.  Note that the most inclusive address range
                             associated with each side of a street edge already appears in the All Lines Shapefile (EDGES.shp).  The TIGER/Line Files contain
                             potential address ranges, not individual addresses.  The term "address range" refers to the collection of all possible structure
                             numbers from the first structure number to the last structure number and all numbers of a specified parity in between along an edge
                             side relative to the direction in which the edge is coded.  The address ranges in the TIGER/Line Files are potential ranges that
                             include the full range of possible structure numbers even though the actual structures may not exist.