Referer HTTP header
E856186
The Referer HTTP header is a field in HTTP requests that indicates the URL of the webpage that linked to the resource being requested, commonly used for analytics, logging, and access control.
All labels observed (1)
| Label | Occurrences |
|---|---|
| Referer HTTP header canonical | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T10328385 — 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: Referer HTTP header Context triple: [Referrer Policy specification, concerns, Referer HTTP header]
-
A.
Referrer Policy specification
The Referrer Policy specification is a web standard that defines how much referrer information browsers include in requests to enhance privacy and security on the web.
-
B.
Location HTTP header
The Location HTTP header is a response header used by web servers to indicate the URL to which a client should be redirected or where a newly created resource can be found.
-
C.
REFER
REFER was Portugal’s former state-owned rail infrastructure company responsible for managing and maintaining the national railway network before its merger into Infraestruturas de Portugal.
-
D.
HTTP
HTTP (Hypertext Transfer Protocol) is the foundational application-layer protocol used for transmitting web pages and other resources across the World Wide Web.
-
E.
RFC 2616
RFC 2616 is the IETF specification that defined HTTP/1.1, standardizing the core semantics and behavior of the Hypertext Transfer Protocol used on 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: Referer HTTP header Target entity description: The Referer HTTP header is a field in HTTP requests that indicates the URL of the webpage that linked to the resource being requested, commonly used for analytics, logging, and access control.
-
A.
Referrer Policy specification
The Referrer Policy specification is a web standard that defines how much referrer information browsers include in requests to enhance privacy and security on the web.
-
B.
Location HTTP header
The Location HTTP header is a response header used by web servers to indicate the URL to which a client should be redirected or where a newly created resource can be found.
-
C.
REFER
REFER was Portugal’s former state-owned rail infrastructure company responsible for managing and maintaining the national railway network before its merger into Infraestruturas de Portugal.
-
D.
HTTP
HTTP (Hypertext Transfer Protocol) is the foundational application-layer protocol used for transmitting web pages and other resources across the World Wide Web.
-
E.
RFC 2616
RFC 2616 is the IETF specification that defined HTTP/1.1, standardizing the core semantics and behavior of the Hypertext Transfer Protocol used on the web.
- F. None of above. chosen
Statements (50)
| Predicate | Object |
|---|---|
| instanceOf | HTTP header field ⓘ |
| alsoKnownAs | Referrer header ⓘ |
| canBeModifiedBy | client-side scripts in some contexts ⓘ |
| canBeSuppressedBy |
browser privacy settings
ⓘ
privacy extensions ⓘ |
| category | request context header ⓘ |
| controlledBy | web browser ⓘ |
| defaultBehavior | browser sends full URL of referring page unless restricted ⓘ |
| definedIn |
HTTP/1.0 specification
ⓘ
linked to:
HTTP/1.0
RFC 1945 ⓘ RFC 2616 ⓘ RFC 7231 ⓘ RFC 9110 ⓘ |
| direction | request header ⓘ |
| exampleValue | https://example.com/page.html ⓘ |
| governedBy |
Referrer-Policy specification
ⓘ
linked to:
Referrer Policy specification
|
| hasMisspellingOrigin | Referrer ⓘ |
| hasSpelling | Referer ⓘ |
| hasStatus | standard HTTP header ⓘ |
| headerName | Referer ⓘ |
| indicates |
URL of the resource from which the request originated
ⓘ
address of previous web page ⓘ |
| introducedFor | allowing servers to identify referring documents ⓘ |
| mayBeOmittedWhen |
navigating from HTTPS to HTTP depending on policy
ⓘ
request is triggered by some privacy modes ⓘ user enters URL directly ⓘ |
| privacyImpact |
can leak browsing history
ⓘ
can leak sensitive URL parameters ⓘ |
| relatedHeader |
Referrer-Policy HTTP header
ⓘ
linked to:
Referrer Policy specification
|
| securityConsideration |
can be spoofed by clients
ⓘ
should not be relied on for strong authentication ⓘ |
| sentIn | HTTP request ⓘ |
| standardizedBy |
IETF
ⓘ
linked to:
Internet Engineering Task Force
|
| usedBy |
CDNs
ⓘ
ad networks ⓘ analytics platforms ⓘ web servers ⓘ |
| usedFor |
CSRF protection heuristics
ⓘ
access control ⓘ clickstream analysis ⓘ logging ⓘ traffic source analysis ⓘ web analytics ⓘ |
| usedInProtocol | HTTP ⓘ |
| usedInProtocolVersion |
HTTP/1.0
ⓘ
HTTP/1.1 ⓘ HTTP/2 ⓘ HTTP/3 ⓘ |
| valueType |
URI
ⓘ
absolute URL ⓘ |
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: Referer HTTP header Description of subject: The Referer HTTP header is a field in HTTP requests that indicates the URL of the webpage that linked to the resource being requested, commonly used for analytics, logging, and access control.
Referenced by (1)
Full triples — surface form annotated when it differs from this entity's canonical label.