Rational Software

E486242

software company technology company

Rational Software was a prominent software company best known for its software development tools and methodologies, including Rational Rose and the Rational Unified Process (RUP), before being acquired by IBM.

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All labels observed (5)

Label	Occurrences
Rational Software canonical	9
IBM Rational	1
IBM Rational Software family	1
IBM acquisition of Rational Software	1
Object Technology International	1

How this entity was disambiguated

This entity first appeared as the object of triple T5017935 — 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: Rational Software
Context triple: [Pure Software, acquiredBy, Rational Software]

A. Eiffel Software
Eiffel Software is a software company best known for developing the Eiffel programming language and tools that emphasize object-oriented design and software reliability.
B. PeopleSoft
PeopleSoft is an enterprise software company best known for its human resources and financial management applications, later integrated into Oracle’s product portfolio.
C. Siebel Systems
Siebel Systems was a leading enterprise software company best known for pioneering customer relationship management (CRM) solutions for large organizations.
D. Rockwell Software
Rockwell Software is a business unit of Rockwell Automation that develops industrial automation and manufacturing execution system (MES) software solutions.
E. BEA Systems
BEA Systems was a software company best known for its enterprise middleware and application server products that played a major role in early Java-based web and enterprise 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: Rational Software
Target entity description: Rational Software was a prominent software company best known for its software development tools and methodologies, including Rational Rose and the Rational Unified Process (RUP), before being acquired by IBM.

A. Eiffel Software
Eiffel Software is a software company best known for developing the Eiffel programming language and tools that emphasize object-oriented design and software reliability.
B. PeopleSoft
PeopleSoft is an enterprise software company best known for its human resources and financial management applications, later integrated into Oracle’s product portfolio.
C. Siebel Systems
Siebel Systems was a leading enterprise software company best known for pioneering customer relationship management (CRM) solutions for large organizations.
D. Rockwell Software
Rockwell Software is a business unit of Rockwell Automation that develops industrial automation and manufacturing execution system (MES) software solutions.
E. BEA Systems
BEA Systems was a software company best known for its enterprise middleware and application server products that played a major role in early Java-based web and enterprise computing.
F. None of above. chosen

Statements (46)

Predicate	Object
instanceOf	software company ⓘ technology company ⓘ
acquiredBy	IBM ⓘ
associatedWith	Unified Modeling Language ⓘ object-oriented analysis and design ⓘ
brandOf	IBM Rational ⓘ linked to: IBM Rational portfolio
contributedTo	industrialization of software engineering practices ⓘ popularization of UML ⓘ
country	United States ⓘ linked to: United States of America
developed	Rational Rose ⓘ Rational Unified Process ⓘ
emphasized	architecture-centric development ⓘ iterative development ⓘ risk-driven development ⓘ use-case driven development ⓘ
focus	configuration management ⓘ model-driven development ⓘ requirements management ⓘ software engineering methodologies ⓘ software testing tools ⓘ
industry	software development tools ⓘ software engineering ⓘ
integratedInto	IBM Rational portfolio ⓘ
knownFor	Rational Rose ⓘ Rational Unified Process ⓘ UML-based tools ⓘ software modeling tools ⓘ
methodology	Rational Unified Process ⓘ
parentCompany	IBM ⓘ
product	Rational Application Developer ⓘ linked to: IBM Rational portfolio Rational ClearCase ⓘ linked to: clearcase Rational ClearQuest ⓘ linked to: IBM Rational ClearQuest Rational RequisitePro ⓘ linked to: Rational software tools Rational Robot ⓘ Rational Rose ⓘ Rational Software Architect ⓘ linked to: Rational software tools Rational Unified Process ⓘ
targetUsers	project managers ⓘ requirements engineers ⓘ software architects ⓘ software developers ⓘ
toolCategory	CASE tools ⓘ configuration management tools ⓘ requirements management tools ⓘ test automation tools ⓘ
usedUML	true ⓘ

How these facts were elicited

Referenced by (13)

Full triples — surface form annotated when it differs from this entity's canonical label.

Pure Software → acquiredBy → Rational Software ⓘ

Erich Gamma → employer → Object Technology International ⓘ

linked to: Rational Software

Booch method → developedAt → Rational Software ⓘ

Grady Booch → workedFor → Rational Software ⓘ

Ivar Jacobson → employer → Rational Software ⓘ

James Rumbaugh → employer → Rational Software ⓘ

Jazz Team Server → brand → IBM Rational ⓘ

linked to: Rational Software

ClearCase → acquiredBy → Rational Software ⓘ

subject linked to: clearcase

Purify → ownedBy → Rational Software ⓘ

Purify → laterAcquiredThrough → IBM acquisition of Rational Software ⓘ

linked to: Rational Software

Rational Unified Process → developer → Rational Software ⓘ

Objectory AB → acquiredBy → Rational Software ⓘ

IBM Rational ClearQuest → partOf → IBM Rational Software family ⓘ

linked to: Rational Software

All labels observed (5)

How this entity was disambiguated Show

Statements (46)

How these facts were elicited Show

Referenced by (13)

How this entity was disambiguated

How these facts were elicited