MCD Status Report Trevor Watson4 February 2008

4 Feb 2008 MCD Status Report Some facts and figures about the main MCD processes : loading of new documents from 2006 (IPC8 Frontfile) loading of IPC data for pre-2006 documents (IPC8 Backfile) IPC Revision

4 Feb 2008 How much IPC data is there in the MCD ? LocationLevel No. of IPC Symbols Family (37m) Subclass Core Advanced 760, Publication (60m) (5m) Subclass Core Advanced ,300, Pre-2006 (55m) Subclass Core Advanced

4 Feb 2008 % documents loaded in MCD with valid IPC8 (by pub date)

4 Feb 2008 Frontfile errors and warnings for documents published in November 2007 Total number of documents Advanced level symbols stored EInvalid symbols not stored371 WVersion Indicator incorrect, value from Validity File taken % WClassification value defaulted to 'N' or 'I'540 WIndexing code not allowed as invention information, changed to 'N'233 WAction date empty, or invalid, set to publication date % WOriginal/Reclass indicator not 'B', 'R', 'V', or 'D', defaulted to 'B' % WReclassified IPC provided as new pub data in front file1.600 WSource indicator not 'H', 'M', or 'G', defaulted to 'H' % WAdditional information delivered as 'F', changed to 'L'36 WMore than one 'F' provided, defaulted to 'L'35

4 Feb 2008 MCD backfile history (pre-2006 documents) IPC8 derived from ECLA, IPC 1-7 (and incrementally in 2006, 2007) AU, DE, JP, EAPO, LT, PT, SI, US DE, MD, RO, RU BR, CZ, (KR), UA

4 Feb 2008 Sources of backfile data Sources of advanced family-level symbols - January 2008 ECLA24.4m(35%) IPC1-79.6m(14%) Backfiles from NOs35.1m(51%) Total69.1m Overall level of completeness (by document) around 91%

4 Feb 2008 Backfile completeness overall figure of 91% can only be a rough guide aspects of completeness –date –kind codes –technical area –quality (the difficult one !) suggestion : –each NO to produce a standard 'Statement of MCD Completeness' for their own collection

4 Feb 2008 MCD revision life-cycle Load RCL and VSF Distribute working lists Store results (with auto deactivation) Automatic reclassificationxx Distribute residual working lists Exchange results Deactivate remaining symbols (?)

4 Feb 2008 Revision periods Families on original working lists Families on residual working lists ( ) docs that arrived after first WLS - docs where new symbols not added

4 Feb 2008 Revision in practice revision periods overlap more than expected –MCD solution : weekly / monthly procedures termination of revision period not clearly defined

4 Feb 2008 Sources of IPC8 data EPOQUE and regular DocDB bibliographic data products quarterly IPC8 incremental DVDs revision results files (yet to be released)

4 Feb 2008 Thank you for your attention !