W3C CSS Validation Service
E664715
The W3C CSS Validation Service is an online tool provided by the World Wide Web Consortium that checks Cascading Style Sheets (CSS) for syntax errors and standards compliance.
All labels observed (1)
| Label | Occurrences |
|---|---|
| W3C CSS Validation Service canonical | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T7420778 — 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: W3C CSS Validation Service Context triple: [W3C Unicorn, relatedTo, W3C CSS Validation Service]
-
A.
W3C markup validation tools
W3C markup validation tools are online and software-based services provided by the World Wide Web Consortium that check web documents for compliance with HTML, XHTML, and other web standards.
-
B.
Cascading Style Sheets test suites
Cascading Style Sheets test suites are standardized collections of tests designed to verify and ensure consistent, interoperable implementation of CSS features across different web browsers and user agents.
-
C.
CSS 2.1 test suite
The CSS 2.1 test suite is a comprehensive collection of tests designed to verify browser conformance to the CSS 2.1 specification.
-
D.
W3C CSS specifications
W3C CSS specifications are the official World Wide Web Consortium standards that define how Cascading Style Sheets control the presentation and layout of web content across browsers and devices.
-
E.
CSS
CSS is the commonly used abbreviation for the South American Health Council, a regional body focused on coordinating public health policies among South American nations.
- 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: W3C CSS Validation Service Target entity description: The W3C CSS Validation Service is an online tool provided by the World Wide Web Consortium that checks Cascading Style Sheets (CSS) for syntax errors and standards compliance.
-
A.
W3C markup validation tools
W3C markup validation tools are online and software-based services provided by the World Wide Web Consortium that check web documents for compliance with HTML, XHTML, and other web standards.
-
B.
Cascading Style Sheets test suites
Cascading Style Sheets test suites are standardized collections of tests designed to verify and ensure consistent, interoperable implementation of CSS features across different web browsers and user agents.
-
C.
CSS 2.1 test suite
The CSS 2.1 test suite is a comprehensive collection of tests designed to verify browser conformance to the CSS 2.1 specification.
-
D.
W3C CSS specifications
W3C CSS specifications are the official World Wide Web Consortium standards that define how Cascading Style Sheets control the presentation and layout of web content across browsers and devices.
-
E.
CSS
CSS is the commonly used abbreviation for the South American Health Council, a regional body focused on coordinating public health policies among South American nations.
- F. None of above. chosen
Statements (47)
| Predicate | Object |
|---|---|
| instanceOf |
CSS validator
ⓘ
W3C service ⓘ web-based validation tool ⓘ |
| abbreviation | W3C CSS Validator NERFINISHED ⓘ |
| accessibleVia | web browser ⓘ |
| backendLibrary | Jigsaw components ⓘ |
| benefit |
helps ensure standards compliance
ⓘ
improves cross-browser compatibility ⓘ reduces CSS errors in production ⓘ |
| category |
web accessibility and quality tool
ⓘ
web development tool ⓘ |
| checks |
CSS standards compliance
ⓘ
CSS syntax ⓘ Cascading Style Sheets NERFINISHED ⓘ |
| hasFeature |
direct link to CSS specification sections
ⓘ
document character encoding detection ⓘ medium selection ⓘ profile selection ⓘ vendor extension warnings ⓘ |
| implements | W3C CSS specifications NERFINISHED ⓘ |
| license | open source ⓘ |
| maintainedBy | W3C NERFINISHED ⓘ |
| output |
list of errors
ⓘ
list of warnings ⓘ validated CSS profile information ⓘ |
| primaryPurpose |
check conformance with CSS specifications
ⓘ
detect CSS syntax errors ⓘ validate CSS documents ⓘ |
| programmingLanguage | Java ⓘ |
| provider | World Wide Web Consortium NERFINISHED ⓘ |
| relatedConcept |
standards-compliant web design
ⓘ
web standards ⓘ |
| relatedStandard |
CSS1
NERFINISHED
ⓘ
CSS2 NERFINISHED ⓘ CSS2.1 NERFINISHED ⓘ CSS3 modules NERFINISHED ⓘ |
| relatedTool | W3C Markup Validation Service NERFINISHED ⓘ |
| requires | internet connection ⓘ |
| supportsInputMethod |
URI input
ⓘ
direct text input ⓘ file upload ⓘ |
| targetUser |
QA engineers
ⓘ
web designers ⓘ web developers ⓘ |
| typicalUse |
CSS debugging
ⓘ
web development ⓘ website quality assurance ⓘ |
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: W3C CSS Validation Service Description of subject: The W3C CSS Validation Service is an online tool provided by the World Wide Web Consortium that checks Cascading Style Sheets (CSS) for syntax errors and standards compliance.
Referenced by (1)
Full triples — surface form annotated when it differs from this entity's canonical label.