CSS Level 2.1
E408527
CSS Level 2.1 is a refined and clarified revision of the CSS2 specification that became the primary W3C recommendation for defining the presentation of HTML and XML documents on the web.
All labels observed (10)
| Label | Occurrences |
|---|---|
| CSS 2.1 | 3 |
| CSS2.1 | 3 |
| CSS2.1 specification | 2 |
| Cascading Style Sheets Level 2 Revision 1 | 2 |
| CSS 2.1 Recommendation | 1 |
| CSS 2.1 specification | 1 |
| CSS Level 2 Revision 1 | 1 |
| CSS Level 2.1 canonical | 1 |
| CSS level 2.1 | 1 |
| CSS2 selectors model | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T4046489 — 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: CSS Level 2.1 Context triple: [CSS Level 2, successor, CSS Level 2.1]
-
A.
CSS Level 2
CSS Level 2 is a W3C-defined style sheet language specification that extends the original CSS with more advanced layout, positioning, and media features for web documents.
-
B.
CSS Level 1 specification
The CSS Level 1 specification is the original World Wide Web Consortium standard that introduced Cascading Style Sheets as a way to control the presentation of HTML documents on the web.
-
C.
CSS Level 4
CSS Level 4 refers to the next generation of Cascading Style Sheets specifications that introduce more advanced layout, styling, and design capabilities for the web beyond earlier CSS levels.
-
D.
CSS Cascade and Inheritance Module
The CSS Cascade and Inheritance Module is a W3C specification that defines how CSS declarations are prioritized, combined, and passed down through the document tree to determine the final computed styles of elements.
-
E.
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.
- 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: CSS Level 2.1 Target entity description: CSS Level 2.1 is a refined and clarified revision of the CSS2 specification that became the primary W3C recommendation for defining the presentation of HTML and XML documents on the web.
-
A.
CSS Level 2
CSS Level 2 is a W3C-defined style sheet language specification that extends the original CSS with more advanced layout, positioning, and media features for web documents.
-
B.
CSS Level 1 specification
The CSS Level 1 specification is the original World Wide Web Consortium standard that introduced Cascading Style Sheets as a way to control the presentation of HTML documents on the web.
-
C.
CSS Level 4
CSS Level 4 refers to the next generation of Cascading Style Sheets specifications that introduce more advanced layout, styling, and design capabilities for the web beyond earlier CSS levels.
-
D.
CSS Cascade and Inheritance Module
The CSS Cascade and Inheritance Module is a W3C specification that defines how CSS declarations are prioritized, combined, and passed down through the document tree to determine the final computed styles of elements.
-
E.
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.
- F. None of above. chosen
Statements (46)
| Predicate | Object |
|---|---|
| instanceOf |
Cascading Style Sheets specification
ⓘ
W3C Recommendation ⓘ web standard ⓘ |
| abbreviation |
CSS2.1
ⓘ
linked to:
CSS Level 2.1
|
| aimsAt | interoperable CSS implementations across user agents ⓘ |
| appliesTo |
aural media
ⓘ
print media ⓘ screen media ⓘ |
| clarifies | ambiguous parts of CSS2 ⓘ |
| compatibleWith |
HTML 4
ⓘ
XHTML ⓘ generic XML vocabularies ⓘ |
| defines |
absolute positioning
ⓘ
background properties ⓘ border properties ⓘ box model ⓘ cascading and inheritance rules ⓘ clear property behavior ⓘ color properties ⓘ fixed positioning ⓘ float layout ⓘ font properties ⓘ list properties ⓘ margin properties ⓘ media types ⓘ padding properties ⓘ positioning schemes ⓘ pseudo-classes ⓘ pseudo-elements ⓘ relative positioning ⓘ selectors ⓘ table layout properties ⓘ visual rendering model for CSS ⓘ |
| fullName |
Cascading Style Sheets Level 2 Revision 1
ⓘ
linked to:
CSS Level 2.1
|
| partOf | CSS language family ⓘ |
| predecessor | CSS Level 2 ⓘ |
| publisher | World Wide Web Consortium ⓘ |
| refines |
CSS Level 2 specification
ⓘ
linked to:
CSS Level 2
|
| removes | features not interoperably implemented in CSS2 ⓘ |
| shortName |
CSS 2.1
ⓘ
linked to:
CSS Level 2.1
|
| standardizes |
presentation of HTML documents
ⓘ
presentation of XML documents ⓘ |
| status | W3C Recommendation ⓘ |
| successor |
CSS Level 3
ⓘ
linked to:
CSS Level 3 modules
|
| usedFor |
separating content from presentation on the web
ⓘ
styling web pages ⓘ |
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: CSS Level 2.1 Description of subject: CSS Level 2.1 is a refined and clarified revision of the CSS2 specification that became the primary W3C recommendation for defining the presentation of HTML and XML documents on the web.
Referenced by (16)
Full triples — surface form annotated when it differs from this entity's canonical label.
linked to: CSS Level 2.1
linked to: CSS Level 2.1
linked to: CSS Level 2.1
linked to: CSS Level 2.1
linked to: CSS Level 2.1
linked to: CSS Level 2.1
linked to: CSS Level 2.1
linked to: CSS Level 2.1
linked to: CSS Level 2.1
linked to: CSS Level 2.1
linked to: CSS Level 2.1
linked to: CSS Level 2.1
linked to: CSS Level 2.1
linked to: CSS Level 2.1
linked to: CSS Level 2.1