v1.9                                    1999-04-02
Specification of file names for Patent Data / SGML

Patent Data/SGML will be delivered on one DLT per week.  For each patent,
the tape will contain exactly one *.ZIP file which in turn contains all the
files for that one patent.  Within the zip file, there will be exactly one
*.SGM file and any number of associated files for complex work units (CWUs,
which includes chemical structures, mathematical formulae, tables, and gene
sequence listings), for drawings, and for any characters which are rendered
as bitmaps (so-called "pullouts").  In addition to the SGML markup of all
text content and references to pullouts, the *.SGM file includes MathML
markup for formulas (made SGML-compliant), CALS Table markup for tables,
SGML markup for sequence listings, and references to each of the associated
files.  For further details about SGM file content, see the Red Book
specification.

File names consist of the following components, as needed, in the order shown.
aacccccccc-nnnnnnnn-annnnn-nnnn.aaa
AA              Issuing country (US)
CCCCCCCC        Patent number (8 characters or numbers)
-               Dash
NNNNNNNN        Issue date as YYYYMMDD (MM and DD left-padded)
-               Dash
A               Content type (D, C, M, T, S, or P)
NNNNN           Left-padded sequence number
-               Dash
NNNN            Left-padded page number
.               Period
AAA             File format (ZIP, SGM, TIF, CDX, MOL, NB)

The sequence numbers represent the order in which the CWUs of a given type 
appear in the printed document.  If a CWU is so large that more than one page 
is required for the printed document, then the image of each printed page will 
be in a separate file and numbered as shown below.

Examples:
 
US06000000-19990120.ZIP              The compressed file
US06000000-19990120.SGM              SGML and other markup
USD0367557-19990120-D00001.TIF       First drawing image
US06000000-19990120-C00001.TIF       First chemistry image
US06000000-19990120-C00001.CDX       CDX file for same
US06000000-19990120-C00001.MOL       MOL file for same
US06000000-19990120-M00001.TIF       First math image
US06000000-19990120-M00001.NB        Mathematica file for same
US06000000-19990120-T00001.TIF       First table image
US06000000-19990120-T00002-0001.TIF  Second table image, first page
USRE035111-19990120-T00002-0002.TIF  Second table image, second page
US06000000-19990120-S00001.TIF       First sequence listing
US06000000-19990120-S00002-0001.TIF  Second sequence listing, first page
US06000000-19990120-S00002-0002.TIF  Second sequence listing, second page
USPP023555-19990120-P00039.TIF       Thirty-ninth pullout image