MCD Status Report

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MCD Status Report

• Trevor Watson

4 February 2008
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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

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How much IPC data is there in the MCD ?
Location Location Level No. of IPC Symbols
Family (37m) Family (37m) Subclass Core Advanced 760,000 63.000.000 69.000.000
Publication (60m) 2006-08 (5m) Subclass Core Advanced 22.000 9,300,000 9.800.000
Publication (60m) Pre-2006 (55m) Subclass Core Advanced 13 240.000 260.000
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documents loaded in MCD with valid IPC8 (by pub
date)
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Frontfile errors and warnings for documents
published in November 2007
Total number of documents 192.129
Advanced level symbols stored 409.627
E Invalid symbols not stored 371
W Version Indicator incorrect, value from Validity File taken 25.710 6
W Classification value defaulted to 'N' or 'I' 540
W Indexing code not allowed as invention information, changed to 'N' 233
W Action date empty, or invalid, set to publication date. 38.443 9
W Original/Reclass indicator not 'B', 'R', 'V', or 'D', defaulted to 'B' 51.513 13
W Reclassified IPC provided as new pub data in front file 1.600
W Source indicator not 'H', 'M', or 'G', defaulted to 'H' 51.519 13
W Additional information delivered as 'F', changed to 'L' 36
W More than one 'F' provided, defaulted to 'L' 35
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MCD backfile history (pre-2006 documents)

• 2005 - IPC8 derived from ECLA, IPC 1-7
• (and incrementally in 2006, 2007)
• 2006 - AU, DE, JP, EAPO, LT, PT, SI, US
• 2007 - DE, MD, RO, RU
• 2008 - BR, CZ, (KR), UA

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Sources of backfile data

• Sources of advanced family-level symbols -
  January 2008

ECLA 24.4m (35)
IPC1-7 9.6m (14)
Backfiles from NOs 35.1m (51)
Total 69.1m
Overall level of completeness (by document)
around 91
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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

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MCD revision life-cycle
2007.01 2007.10 2008.01 2008.04
Load RCL and VSF
Distribute working lists
Store results (with auto deactivation)
Automatic reclassification x x
Distribute residual working lists
Exchange results
Deactivate remaining symbols (?)
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Revision periods
2007.01 2007.10 2008.01 2008.4
Families on original working lists 43.359 9.888 26.352 5.800
Families on residual working lists (02.02.08) 4.618 2.233
- docs that arrived after first WLS - docs where
new symbols not added
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Revision in practice

• revision periods overlap more than expected
• MCD solution weekly / monthly procedures
• termination of revision period not clearly
  defined

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Sources of IPC8 data

• EPOQUE and esp_at_cenet
• regular DocDB bibliographic data products
• quarterly IPC8 incremental DVDs
• revision results files (yet to be released)

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• Thank you for your attention !

mcd_at_epo.org