VSAM
E724117
VSAM (Virtual Storage Access Method) is an IBM file storage access method used on mainframe operating systems to organize and manage data in various indexed and sequential formats.
All labels observed (2)
How this entity was disambiguated
This entity first appeared as the object of triple T8284794 — resolving that mention is where its identity was fixed. The disambiguator weighed these candidate entities and picked the highlighted one (or “None”, minting a new entity). This is how homonymy is resolved: the same surface form can point to different entities.
NED1
Entity disambiguation (via context triple)
gpt-5-mini-2025-08-07
Target entity: VSAM Context triple: [z/VSE, supports, VSAM]
-
A.
MVS
MVS (Multiple Virtual Storage) is an IBM mainframe operating system that became the dominant successor to OS/360, providing advanced virtual memory and multitasking capabilities for enterprise computing.
-
B.
VMS
VMS is a multiuser, multitasking operating system originally created by Digital Equipment Corporation for its VAX minicomputers, known for its robustness, security features, and influence on later systems like Windows NT.
-
C.
VMS
VMS is a regional public transport association in the Chemnitz area of Germany that coordinates and manages integrated fares and services across multiple transit operators.
-
D.
CICS
CICS is the College of Information and Computer Sciences at the University of Massachusetts Amherst, known for its research and education in computer science and related fields.
-
E.
VAX
VAX is a line of 32-bit minicomputers and their associated architecture developed by Digital Equipment Corporation, widely used in the late 20th century for time-sharing and scientific computing.
- F. None of above. chosen
- G. Unsure - the case is ambiguous/there is not enough information to decide.
NED2
Entity disambiguation (via description)
gpt-5-mini-2025-08-07
Target entity: VSAM Target entity description: VSAM (Virtual Storage Access Method) is an IBM file storage access method used on mainframe operating systems to organize and manage data in various indexed and sequential formats.
-
A.
MVS
MVS (Multiple Virtual Storage) is an IBM mainframe operating system that became the dominant successor to OS/360, providing advanced virtual memory and multitasking capabilities for enterprise computing.
-
B.
VMS
VMS is a multiuser, multitasking operating system originally created by Digital Equipment Corporation for its VAX minicomputers, known for its robustness, security features, and influence on later systems like Windows NT.
-
C.
VMS
VMS is a regional public transport association in the Chemnitz area of Germany that coordinates and manages integrated fares and services across multiple transit operators.
-
D.
CICS
CICS is the College of Information and Computer Sciences at the University of Massachusetts Amherst, known for its research and education in computer science and related fields.
-
E.
VAX
VAX is a line of 32-bit minicomputers and their associated architecture developed by Digital Equipment Corporation, widely used in the late 20th century for time-sharing and scientific computing.
- F. None of above. chosen
Statements (51)
| Predicate | Object |
|---|---|
| instanceOf |
IBM access method
ⓘ
file storage access method ⓘ mainframe data access method ⓘ |
| configuredWith |
IDCAMS utility
ⓘ
linked to:
IBM utilities
|
| dataSetTypeFullName |
ESDS: Entry-Sequenced Data Set
ⓘ
KSDS: Key-Sequenced Data Set ⓘ LDS: Linear Data Set ⓘ RRDS: Relative Record Data Set ⓘ |
| definedBy | IDCAMS DEFINE CLUSTER command ⓘ |
| developedBy | IBM ⓘ |
| fullName | Virtual Storage Access Method ⓘ |
| introducedIn | early 1970s ⓘ |
| logicalUnit |
control area
ⓘ
control interval ⓘ |
| replaced |
BDAM
ⓘ
ISAM ⓘ
linked to:
B-tree
|
| supportsAccessMethod |
direct access
ⓘ
indexed access ⓘ sequential access ⓘ skip-sequential access ⓘ |
| supportsDataSetType |
ESDS
ⓘ
KSDS ⓘ LDS ⓘ RRDS ⓘ |
| supportsEnvironment |
CICS
ⓘ
linked to:
CICS Transaction Server
batch JCL jobs ⓘ |
| supportsFeature |
alternate indexes
ⓘ
control area splitting ⓘ control interval buffering ⓘ data sharing in sysplex environments ⓘ key-range partitioning ⓘ record compression ⓘ record-level access ⓘ |
| supportsLanguageAccess |
Assembler
ⓘ
COBOL ⓘ PL/I ⓘ |
| supportsLogging | CICS journaling and recovery ⓘ |
| supportsRecordOrganization |
fixed-length records
ⓘ
variable-length records ⓘ |
| usedFor |
CICS data storage
ⓘ
DB2 underlying storage (catalog and internal structures) ⓘ batch processing ⓘ high-volume data storage ⓘ online transaction processing ⓘ |
| usedOn |
IBM mainframe operating systems
ⓘ
MVS ⓘ OS/390 ⓘ VSE ⓘ
linked to:
VSE/AF
z/OS ⓘ z/VM ⓘ z/VSE ⓘ |
How these facts were elicited
The pipeline generated the facts above by prompting gpt-5.1 with this entity's name + description and the instruction below.
Instruction
You are a knowledge base construction expert. Given a subject entity and a description of it, return factual statements that you know for the subject as a JSON list of dictionaries(triples), where keys must be "subject", "predicate" and "object". The number of facts may be very high, between 25 to 50 or more, for very popular subjects. For less popular subjects, the number of facts can be very low, like 5 or 10. # Requirements - If you don't know the subject at all, return an empty list. - If the subject is not a named entity, return an empty list. - Include at least one triple where predicate is "instanceOf". - Do not get too wordy. - Separate several objects into multiple triples with one object.
Input
Subject: VSAM Description of subject: VSAM (Virtual Storage Access Method) is an IBM file storage access method used on mainframe operating systems to organize and manage data in various indexed and sequential formats.
Referenced by (5)
Full triples — surface form annotated when it differs from this entity's canonical label.
linked to: VSAM