FAST Changes

Log of updates to FAST Subject Headings

Recent FAST changes

DateNotesMARC Change File
2017-02-09 340 Records FAST Change File
2017-02-08 168 Records FAST Change File
2017-02-06 49 Records (form/genre) FAST Change File
2017-02-06 1188 Records FAST Change File
2017-01-11 296 Records FAST Change File
2017-01-10 858 Records (form/genre) FAST Change File
2017-01-10 267 Records FAST Change File
2017-01-05 1036 Records FAST Change File
2016-12-13 5 Records (form/genre) FAST Change File
2016-12-13 487 Records FAST Change File
2016-12-09 175 Records FAST Change File
2016-12-06 1152 Records FAST Change File
2016-11-15 4 Records (form/genre) FAST Change File
2016-11-14 383 Records FAST Change File
2016-11-11 1495 Records FAST Change File
2016-11-08 1397 Records FAST Change File
2016-10-17 1 Records (form/genre) FAST Change File
2016-10-17 1531 Records FAST Change File
2016-10-10,11 Large update of 4xx and 5xx headings, affecting 125,101 records. No change 1xx. Download next full file dumps to capture changes. Download Page
2016-10-05 207 Records FAST Change File
2016-09-13 793 Records FAST Change File
2016-09-12 1529 Records. Note many pre-FAST splits in LCSH were retroactively added to FAST. As part of our update logistics, many were added as New and then Split the next update. FAST Change File
2016-09-12 1351 Records FAST Change File
2016-09-09 1085 Records (form/genre) FAST Change File
2016-09-07 61 Records (form/genre) FAST Change File
2016-09-07 386 Records FAST Change File
2016-08-04 758 Records FAST Change File
n/a Date: 2016-07-2 Widespread addition of 5xx $w broader indications and links to various external sources, including GND, Rameau, and Wikipedia. The 005 dates were not modified for this clerical update. n/a
2016-07-13 80411 Records FAST Change File
2016-07-08 845 Records FAST Change File
2016-07-06 337 Records FAST Change File
n/a Date: 2016-06-27 Widespread correction modifying http to https for viaf links. The 005 dates were not modified for this clerical update. n/a
2016-06-13 403 Records FAST Change File
2016-06-08 962 Records FAST Change File
2016-05-13 106 Records FAST Change File
2016-05-06 497 Records FAST Change File
2016-04-12 173 Records FAST Change File
2016-04-08 377 Records FAST Change File
2016-03-25 6222 Records FAST Change File
2016-03-11 176 Records FAST Change File
2016-03-08 657 Records FAST Change File
2016-02-29 41 Records FAST Change File
2016-02-23 118 Records (form/genre) FAST Change File
2016-02-12 461 Records FAST Change File
2016-02-10 428 Records FAST Change File
2016-02-09 7231 Records FAST Change File
2016-01-14 373 Records FAST Change File
2016-01-12 20 Records (form/genre) FAST Change File
2016-01-12 719 Records FAST Change File
2015-12-14 160 Records FAST Change File
2015-12-09 614 Records FAST Change File
2015-12-04 129 Records FAST Change File
2015-12-04 194 Records (form/genre) FAST Change File
2015-11-10 1438 Records FAST Change File
2015-11-09 1511 Records FAST Change File
2015-10-09 77 Records FAST Change File
2015-09-28 749 Records FAST Change File
2015-09-25 65 Records (form/genre) FAST Change File
2015-09-23 316 Records FAST Change File
2015-08-31 4971 Records FAST Change File
2015-08-14 337 Records (form/genre) FAST Change File
2015-08-10 679 Records FAST Change File
2015-08-06 1032 Records FAST Change File
2015-08-03 500 Records FAST Change File
2015-06-24 79976 Records FAST Change File
2015-06-24 67549 Records FAST Change File
2015-06-19 156 Records (form/genre) FAST Change File
2015-06-12 4379 Records FAST Change File
2015-06-12 773 Records (form/genre) FAST Change File
2015-05-18 1429 Records: Also over 32,498 originally deleted headings were readded as deprecated headings with forward references. There were originally deleted since they "were never valid", but the headings could be mapped to valid headings. FAST Change File
FAST ReAdd Deleted
2015-04-09 642 Records FAST Change File
2015-04-06 New Set of Dump files produced. Download Page
2015-04-06 615 Records FAST Change File
2015-03-05 Clerical update for VIAF Links (1.2M ), Wikipedia (160k); No change to 005 time stamp. Download next full dump files to capture changes. Download Page
2015-03-05 1923 Records FAST Change File
2015-01-27 7198 Records FAST Change File
2015-01-21 1285 Records FAST Change File
2015-01-09 471 Records FAST Change File
2014-12-17 15368 Records: A large number of undifferentiated names were removed since they were unsuitable for subject use. FAST Change File
2014-12-05 1041 Records FAST Change File
2014-11-06 2137 Records FAST Change File
2014-10-31 Clerical update to add extra information. 180632 RDA info (3xx fields) affecting 55186 records - 118968 Coded Dates (046 field) affecting 118426 records. Total records. No change 1xx, 4xx, 5xx, 7xx headings or to 005 time stamp. Download next full file dumps to capture changes. Download Page
2014-10-13 532 Records FAST Change File
2014-09-23 2569 Records FAST Change File
2014-09-05 916 Records FAST Change File
2014-08-22 356 Records FAST Change File
2014-08-15 87 Records FAST Change File
2014-08-05 New Set of Dump files produced. Download Page

FAST Update Strategy and Logistics

The FAST Authority file is updated periodically and is made available by OCLC under the Open Data Commons Attribution License (ODC-By): http://www.oclc.org/research/activities/fast/odcby.htm. Periodically, the entire set of FAST files is made available for download at FAST Dataset Download These are updated about every 3 months.

To maintain and enhance FAST, updates to the FAST Authority file are more frequent. These more current updates to individual records are available though the searchFAST interface or through Linked Data on a per record basis if needed. The changes are summarized on this page.

Reasons for Updates:

Since FAST is derived from the Library of Congress (LC)Subject Headings and Names files, we update FAST periodically to follow changes to those files. Most Library of Congress changes are incorporated monthly, although some require further review and take a little longer. Also, FAST incorporates substantial linking information to other authority files, such as VIAF and Geonames, and these links are reviewed and updated periodically. Of course, routine maintenance, enhancements, and corrections also are reasons for updates.

Update Change file format

To create an easy reference for changes to the FAST authority file, the changes are recorded in a spreadsheet.

Change TypeFAST NumberCurrent HeadingFormer HeadingLinking EntryAdditonal Linking EntryNotes (this column is not in spreadsheet
New Headingfst######New Heading[blank]LCSH/NACO headingLCSH/NACO heading (as needed)
Modified Headingfst######Modified HeadingFormer HeadingLCSH/NACO headingLCSH/NACO heading (as needed)
Other Changesfst######Current Heading[blank]LCSH/NACO headingLCSH/NACO heading (as needed)The main heading is unchanged for this record. 4xx, 5xx or 7xx or other fields may have changed.
Deprecatedfst######[blank]Former HeadingFAST replacement heading  7XX links are for the replacement FAST headings. Links to LCSH/NACO are less interesting now.
Splitfst######[blank]Former HeadingFAST replacement headingFAST replacement heading (as needed)7XX links are for the replacement FAST headings. Links to LCSH/NACO are less interesting now.
Obsoletefst######[blank]Former HeadingLCSH/NACO headingLCSH/NACO heading (as needed)The referenced LCSH/NACO headings may provide information about why these headings were made obsolete or deleted with no replacement headings specified.

Date and Time of Last Transaction

In MARC, the 005 field records the date and time of the last transaction for a record. We always follow this practice for any substantial change to the record, such as the authorized or see also headings. However, since FAST incorporates more 'living' information, such as the annual count of how frequently the heading is found in WorldCat, resetting the time stamp would mask the date of the last substantive change. Examples of changes that don't result in Transaction date changes are: validation and replacement of VIAF or other links, updates to usage statistics, and minor clerical updates that touch a large number of records. A MARC Change File will be made available for any change that results in a Date and Time of Last Transaction change.

FAST Record Numbering

FAST strives to associate a FAST number with a concept. If the string representing the concept changes, the FAST number will be kept the same. This follows LC practice, and generally a LC control number (LCCN) will always be associated with the same FAST number

When two concepts are merged, the now non-preferred heading is deprecated in favor of an existing concept. Deprecated records contain links to the replacement records, and the new records have a reference to the old form of the heading. These are clearly indentified in the MARC version for the records, and appropriate mappings are made of this information to the RDF versions.

If a concept is split into two or more concepts, new numbers are assigned to the new concepts and the original FAST number will be deprecated. For example, "Nurses and Nursing" was split into two concepts, "Nurses" and "Nursing", and two new numbers are assigned.

At first FAST attempted to control both the FAST number and heading string as a pair. If an authorized heading string changed, a new FAST number was assigned, and the heading string was not reused. This became impractical, so the practice was discontinued. Many deprecated records are still in FAST that record the complete earlier form of the record.