CSS Pseudo-Elements Module
E856238
The CSS Pseudo-Elements Module is a W3C specification that defines the syntax and behavior of pseudo-elements like ::before and ::after, enabling authors to style and insert generated content into specific parts of elements.
All labels observed (1)
| Label | Occurrences |
|---|---|
| CSS Pseudo-Elements Module canonical | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T10329289 — 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 Pseudo-Elements Module Context triple: [CSS Fullscreen Module Level 1, relatedTo, CSS Pseudo-Elements Module]
-
A.
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.
-
B.
CSS Containment Module Level 1
CSS Containment Module Level 1 is a W3C CSS specification that defines mechanisms for isolating a subtree of the DOM to improve rendering performance and predictability of layout, style, and paint.
-
C.
CSS Custom Properties for Cascading Variables Module Level 1
CSS Custom Properties for Cascading Variables Module Level 1 is a W3C CSS specification that standardizes the use of custom properties (often called CSS variables) to enable reusable, dynamically cascading values in stylesheets.
-
D.
CSS Basic User Interface Module Level 3
CSS Basic User Interface Module Level 3 is a W3C specification that defines user interface–related CSS features such as box sizing, outlines, cursor properties, and UI states for web content.
-
E.
CSS Level 3 modules
CSS Level 3 modules are a collection of W3C specifications that extend and refine Cascading Style Sheets by defining advanced layout, styling, and presentation features for the web.
- 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 Pseudo-Elements Module Target entity description: The CSS Pseudo-Elements Module is a W3C specification that defines the syntax and behavior of pseudo-elements like ::before and ::after, enabling authors to style and insert generated content into specific parts of elements.
-
A.
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.
-
B.
CSS Containment Module Level 1
CSS Containment Module Level 1 is a W3C CSS specification that defines mechanisms for isolating a subtree of the DOM to improve rendering performance and predictability of layout, style, and paint.
-
C.
CSS Custom Properties for Cascading Variables Module Level 1
CSS Custom Properties for Cascading Variables Module Level 1 is a W3C CSS specification that standardizes the use of custom properties (often called CSS variables) to enable reusable, dynamically cascading values in stylesheets.
-
D.
CSS Basic User Interface Module Level 3
CSS Basic User Interface Module Level 3 is a W3C specification that defines user interface–related CSS features such as box sizing, outlines, cursor properties, and UI states for web content.
-
E.
CSS Level 3 modules
CSS Level 3 modules are a collection of W3C specifications that extend and refine Cascading Style Sheets by defining advanced layout, styling, and presentation features for the web.
- F. None of above. chosen
Statements (47)
| Predicate | Object |
|---|---|
| instanceOf |
CSS module
ⓘ
W3C specification ⓘ technical standard ⓘ |
| clarifies | legacy single-colon pseudo-element syntax compatibility ⓘ |
| defines |
cascading and inheritance rules for pseudo-elements
ⓘ
double-colon pseudo-element notation ⓘ how pseudo-elements interact with generated content ⓘ how pseudo-elements interact with hit-testing ⓘ how pseudo-elements interact with layout ⓘ how pseudo-elements interact with painting ⓘ how pseudo-elements participate in the box tree ⓘ |
| definesBehaviorFor | CSS pseudo-elements NERFINISHED ⓘ |
| definesConcept | CSS pseudo-element ⓘ |
| definesSyntaxFor | CSS pseudo-elements ⓘ |
| distinguishesFrom | CSS pseudo-classes ⓘ |
| enables |
insertion of generated content
ⓘ
styling of specific parts of elements ⓘ |
| hasVersion |
CSS Pseudo-Elements Level 3
NERFINISHED
ⓘ
CSS Pseudo-Elements Level 4 NERFINISHED ⓘ |
| partOf |
CSS Level 3
NERFINISHED
ⓘ
CSS Level 4 NERFINISHED ⓘ |
| publishedBy | World Wide Web Consortium NERFINISHED ⓘ |
| relatedTo |
Selectors Level 3
NERFINISHED
ⓘ
Selectors Level 4 NERFINISHED ⓘ |
| shortName | css-pseudo NERFINISHED ⓘ |
| specifiesPseudoElement |
::after
ⓘ
::backdrop ⓘ ::before ⓘ ::cue ⓘ ::cue-region ⓘ ::file-selector-button ⓘ ::first-letter ⓘ ::first-line ⓘ ::grammar-error ⓘ ::marker ⓘ ::part() ⓘ ::placeholder ⓘ ::selection ⓘ ::slotted() ⓘ ::spelling-error ⓘ ::target-text ⓘ |
| status | W3C Candidate Recommendation (for some levels/editions) ⓘ |
| usedFor |
styling form control subparts
ⓘ
styling generated content ⓘ styling media text tracks ⓘ styling shadow DOM parts ⓘ styling typographic fragments ⓘ |
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 Pseudo-Elements Module Description of subject: The CSS Pseudo-Elements Module is a W3C specification that defines the syntax and behavior of pseudo-elements like ::before and ::after, enabling authors to style and insert generated content into specific parts of elements.
Referenced by (1)
Full triples — surface form annotated when it differs from this entity's canonical label.