The WorldCat® Collection Analysis service is a web-accessible collection analysis tool which supports multiple aspects of library collections management.
You can search for, display, print and download information about your collection(s) as represented by your holdings in WorldCat.
The service's subject analysis dimension presents your holdings according to the OCLC Conspectus, a proprietary three-level subject hierarchy described in section 1.2, "The OCLC Conspectus" below. In addition to subject coverage, you can view a collection's makeup in terms of other analysis dimensions that include:
in whatever order you choose. See section 1.4, "Analysis Dimensions" for the full list and description of all analysis dimensions.
Your library can then compare its holdings to those of:
These comparisons show titles held in common with one or more comparison libraries (called overlap); titles that are unique to your own library (called uniqueness); titles held by one or more comparison libraries that are not owned by your library.
You can track how your library's collection is used within your own community via a Circulation Analysis. This analysis tracks circulation activity at the title level, with title defined as an item having a unique OCLC accession number. Activity of individual items (that is, copies of the same title) is shown at the barcode level.
In addition to the general collection content dimensions shown above, analysis dimensions for circulation activity include:
See section 1.4, "Analysis Dimensions" for the full list and description of all analysis dimensions.
You can also determine external use of your collection, as well as discover potential areas for acquisition, by tracking your collection's borrowing and lending activity within WorldCat Resource Sharing.
In addition to the general collection content dimensions shown above, analysis dimensions for borrowing and lending activity include:
See section 1.4, "Analysis Dimensions" for the full list and description of all analysis dimensions.
The supporting database is updated quarterly. For newly subscribing institutions, their analyses will include all holdings information preceding the most recent quarterly database update (January, April, July, October). These institutions' holdings will become fully current with the first update after they have subscribed to the service.
Circulation Analysis. Circulation data is updated annually with the January update.back to top
The OCLC® Conspectus is a subject hierarchy consisting of divisions, categories, and subject descriptors. The Conspectus provides a framework to systematically inventory and describe library collections, and can be used with Dewey ® Decimal, Library of Congress and National Library of Medicine classifications.
The Conspectus is structured in hierarchical order, from broad divisions to very specific subjects. Each level is an increasingly detailed partition of the previous level. The three levels in the OCLC Conspectus, in hierarchical order, are:
|Division||32||Divisions represent broad disciplines of knowledge. They are not tied to a specific classification scheme. Example: Music|
|Category||approximately 500||Categories represent topics within a specific division. These are correlated with LC, Dewey Decimal or NLM classification numbers. Example: Music Instrumental Music|
|Subject||approximately 7000||Subjects provide the most detailed identification within a specific category. Example: Music Instrumental Music Piano Music|
Classification numbers from the WorldCat master record are mapped to each of the divisions, categories, and subjects of the OCLC Conspectus. Library of Congress (LC) and Dewey Decimal (DDC) numbers are mapped to the same Conspectus structure. National Library of Medicine (NLM) classification numbers are mapped to six NLM-only divisions.
For Canadian users, we have included:
To see these classification numbers, position (or hover) the cursor over a term so that the normal pointer becomes the hand pointer. The classification numbers will appear in a yellow box below the hand.
Classification numbers are chosen as follows:
The WorldCat Collection Analysis service provides five types of analyses. Libraries subscribing to the service as individual institutions have access to the Individual Library Analysis, the Individual Library Comparison and the ILL Analyses. Libraries subscribing as part of a group have access to the Group Analysis and the Aggregated Group Analysis.
The Individual Library Analysis presents your library's holdings — and only your library's holdings — according to your selected analysis dimensions.
This analysis is automatically created for libraries subscribing to WorldCat Collection Analysis as individual institutions and appears as My Library in the Basic Analyses area of the Data to Analyze screen.
An Individual Library Comparison allows you to compare your library's holdings to the collections of other OCLC member libraries. For this analysis type, you create a comparison group of from one to ten libraries. Within the group, titles from all group members are combined and duplicates are removed so that the group appears as a single institution. The resulting analysis is called a Peer Comparison (see Chapter 8, "Peer Comparisons" for more information).
You must create an Individual Library Comparison using the WorldCat Services Administrative Module (see Chapter 2, "Administrative Functions"). There is no limit to the number of comparison groups that you can create, but the group name must be unique among all groups created under the same authorization. To be included in any Individual Library Comparison a library must have holdings in WorldCat.
Other applications. The Individual Library Comparison is the basis for several additional analyses that compare your library to certain specific collections. These analyses include:
The ILL Analysis presents an individual library's borrowing and lending activity within WorldCat Resource Sharing. As Borrower you can track your activity by request date, request frequency, or request cost. As Lender you can track your activity by request date or request frequency.
The ILL Analyses are available only to libraries that subscribe to WorldCat Collection Analysis as individual institutions. You must create an analysis for My Library as Borrower and/or My Library as Lender using the WorldCat Services Administrative Module (see Chapter 2, "Administrative Functions").
The Circulation Analysis presents the local circulation activity for an individual library's collection.
The Circulation Analysis is available only to libraries that subscribe to WorldCat Collection Analysis as individual institutions. You must create the analysis using the WorldCat Services Administrative Module (see Chapter 2, "Administrative Functions").
A Group Analysis shows the titles for the individual member libraries within a group, according to the selected analysis dimensions. This enables networks and consortia to gauge each member's strengths and deficiencies.
This analysis is automatically created when a group of libraries subscribes to WorldCat Collection Analysis as a Subscription Group, and appears as [group name] in the Basic Analyses area of the Data to Analyze screen.
An Aggregated Group Analysis combines the titles of all members of the Subscription Group and then removes duplicates so that the group appears as a single institution.
This analysis is automatically created when a group of libraries subscribes to WorldCat Collection Analysis as a Subscription Group, and appears as [ group name (Aggregated) ] in the Basic Analyses area of the Data to Analyze screen.
Other applications. The Aggregated Group Analysis is the basis for several additional analyses that compare your group's holdings to certain specific collections. These analyses include:
The service allows you view your collection from a number of different aspects called analysis dimensions, and to manipulate the order in which the dimensions are displayed. The additional dimensions are: Publication Date, Language, Format, Audience, Library, Library Role (Borrower or Lender), Holding Count, Holding Status, Copy vs Loan.
Not all dimensions are available for all analysis types.
Publication dates are grouped into these ranges:
Publication date ranges will change as years are added.
Date ranges are based on MARC record fields:
008, bytes 7-10 (Date 1)
260 ‡c (Date of publication, distribution, etc.)
You can limit your analysis by LC, Dewey, or NLM call number. Limiting by call number results in the list of records from the Conspectus Subject that contains the call number you entered. The more precise the call number, the narrower your results.
|Entering...||Results in all titles from...|
|ND27||Art & Architecture > Painting > Painting (ND0-9999)|
|ND1640||Art & Architecture > Painting > Examination and Conservation of Paintings (ND1630-1662)|
|730||Art & Architecture > Sculpture > Sculpture (730-735)|
|732.4||Art & Architecture > Sculpture > History - Special Countries (730.9; 732.4; 732.6-732.7; 732.9)|
|WG595||Medicine by Body System > Cardiovascular System > Cardiovascular System (WG595)|
|WG595.M38||Medicine by Body System > Cardiovascular System > Mesenteric Arteries (WG595.M38)|
Fifty-four languages from the MARC Code List for Languages appear as analysis results. The remaining languages are grouped under Other.
|Bulgarian||Greek, Modern |
The actual language of an item will always display on a List of Records and on its Detailed Record.
Language is based on MARC record Field 008, bytes 35-37 (Language)
The WorldCat Collection Analysis service uses these material types.
|Archival Materials||Continually Updated Resources, Electronic||Serial Publications, Electronic|
|Archival Materials, Electronic||Continually Updated Resources, Microform||Serial Publications, Microform|
|Archival Materials, Microform||Maps||Sound Recordings|
|Articles||Maps, Electronic||Sound Recordings, Electronic|
|Articles, Electronic||Maps, Microform||Sound Recordings, Microform|
|Articles, Microform||Musical Scores||Texts, Electronic|
|Books||Musical Scores, Electronic||Visual Materials|
|Books, Microform||Musical Scores, Microform||Visual Materials, Electronic|
|Computer Files||Serial Publications||Visual Materials, Microform|
|Continually Updated Resources|
Format is based on the MARC record Leader (LDR), bytes 6 (Type of Record) and 7 (Bibliographic level).
The WorldCat Collection Analysis service uses the same levels and the same mapping criteria as the OCLC FirstSearch Service: Adult and Juvenile.
Audience is based on MARC record Field 008, byte 22 (Target audience).
For any analysis of ILL activity a library is identified as either the Borrower or the Lender.
For a My Library as Borrower ILL Analysis, this dimension shows how many borrowing requests were submitted for items not owned by the library. This dimension is not available for a My Library as Lender analysis.
When the selected analysis involves a comparison between:
results may be displayed according to the number of libraries within a group that hold a given title.
This Individual Library Comparison is between the Heartland Memorial Library and a local group consisting of three community college libraries. Heartland Memorial Library holds a total of 248 titles, and the group holds a total of 599 titles.
Expanding Local Community Coll. shows that of the group's 599 titles:
For a WorldCat Comparison, this dimension shows how widely a given item is held within WorldCat.
Individual institutions. For a library subscribing as an individual institution, the analysis indicates how many of your library's holdings are:
and so on up to held by your library and by more than 10 other libraries in WorldCat
Groups. For a library subscribing as a member of a group, WorldCat Collection Analysis combines the titles of all the group member libraries and removes duplicates, treating the group as though it were a single institution. This combined (or aggregated) group is compared to all of WorldCat and the analysis indicates how many of the group's holdings are held in WorldCat:
and so on up to held within your group and by more than 10 other libraries that are not members of your group.
For ILL Analyses this dimension shows the total number of items requested (Borrower) or shipped (Lender). You can view data by annual or quarterly totals.
For ILL Analyses this dimension shows how often a request was submitted (Borrower) or shipped (Lender). You can view aggregate or annual totals
For ILL Analyses this dimension shows how much your library paid (in ranges of U.S. dollars) for items you borrowed.
For a My Library as Borrower ILL Analysis, this dimension shows how many borrowing requests were submitted for physical items that the library expects to ship back to the Lender ( loan - such as books or videos) as opposed to items that it does not expect to ship back to the Lender ( copy - such as copies of journal articles).
For a My Library as Lender analysis, this dimension shows how many items were shipped that the Lender expects to be returned and checked back into its collection ( loan - such as books or videos) as opposed to items that it does not expect to be returned ( copy - such as copies of journal articles).
For a Circulation Analysis, this dimension identifies the year in which items were checked out.
For a Circulation Analysis, this dimension identifies the specific library or collection from which items were checked out, for example: Juvenile or Popular Reading.back to top
The Overlap view of an analysis shows the number of titles your library holds in common with other libraries/institutions. This view is available for Group Analyses ( Chapter 5), Authoritative List Comparisons ( Chapter 7), Peer Comparisons ( Chapter 8), Secondary Groups ( Chapter 9) and Predefined Groups ( Chapter 10). See the relevant chapter for details.
For these comparisons, Overlap shows the number of titles that the subscribing library owns jointly with the collective titles (duplicates removed) of an individual peer institution (One-to-one comparison), of its two- to ten-member Comparison Group (Peer Comparison), or of an OCLC-defined group (Predefined Group).
Example: Peer Comparison
For these analyses, Overlap is the number of titles each library owns jointly with another library in the group.
Example: Group Analysis
The Uniqueness view of an analysis shows how many of your library's titles are held by you alone. This view is available for Group Analyses ( Chapter 5), Peer Comparisons ( Chapter 8), Secondary Groups ( Chapter 9) and Predefined Groups ( Chapter 10). See the relevant chapter for details.
For these comparisons, Uniqueness shows how many of a library's titles are not shared with an individual peer institution (One-to-one comparison), with its two- to ten-member Comparison Group (Peer Comparison), or with an OCLC-defined group (Predefined Group).
Example: Peer Comparison
For these analyses, Uniqueness shows how many of a library's titles are shared with one group member, two group members, three group members, and so on.
Example: Group Analysis
For any given item, within the WorldCat Collection Analysis service uniqueness is defined as the lack of an identical record within the comparison library or group. Record matching is based on the OCLC number assigned to each record. Since libraries set their holdings on specific records, those libraries who have set their holdings on the same record (with its unique OCLC number) will match when a comparison is created.
Various differences in the makeup of an item trigger creation of a new record. Such differences can include:
The creation of a new record—and therefore a new OCLC number—prevents matching for different formats of what is essentially the same intellectual content.
This edition of Don Quixote (OCLC 20459410, Las Americas Publishing, 1966) is held by 9 libraries which include Atlanta University (Atlanta, GA) and the University of South Carolina (Columbia, SC). In a comparison between:
this title is counted in the Overlap column since both libraries have set holdings on the same OCLC record.
this title is counted in the Unique column for both Atlanta University and Jacksonville State or Jacksonville State's group since the libraries have set holdings on different OCLC records.
If Atlanta University and the University of South Carolina are members of the same Subscription group, Don Quixote (OCLC 20459410) is counted for each library on the Overlap tab because they have set holdings on the same OCLC record.
If Atlanta University and the University of South Carolina are members of the same Subscription Group, Don Quixote (OCLC 20459410) is counted in the Shared by 2 column on the Uniqueness tab because both libraries have set holdings on the same OCLC record. (assuming no other library in the group has set holdings on this record).
If Jacksonville University is also a member of this same Subscription Group, its Don Quixote (OCLC 15714565) is counted in the Unique column (assuming no other library in the group has set holdings on this record.
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