Octopus card
E1001627
The Octopus card is a rechargeable contactless smart card widely used in Hong Kong for public transport fares and everyday electronic payments.
All labels observed (2)
| Label | Occurrences |
|---|---|
| Octopus Cards Limited | 1 |
| Octopus card canonical | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T12723700 — 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: Octopus card Context triple: [MTR urban lines, ticketing, Octopus card]
-
A.
Oyster card
The Oyster card is a rechargeable smartcard used for convenient, cashless payment on public transport services across London.
-
B.
ORCA card
The ORCA card is a reusable, contactless smart card used to pay fares across multiple public transit systems in the Puget Sound region of Washington State.
-
C.
Opal card
The Opal card is a reusable, contactless smartcard used to pay for public transport across much of New South Wales, Australia.
-
D.
Metro TAP card
The Metro TAP card is a reusable, reloadable smart fare card used for contactless payment across the Los Angeles County public transit system.
-
E.
MetroCard
MetroCard is a magnetic stripe payment card formerly used as the primary method for paying fares on New York City’s public transit system, including subways and buses.
- 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: Octopus card Target entity description: The Octopus card is a rechargeable contactless smart card widely used in Hong Kong for public transport fares and everyday electronic payments.
-
A.
Oyster card
The Oyster card is a rechargeable smartcard used for convenient, cashless payment on public transport services across London.
-
B.
ORCA card
The ORCA card is a reusable, contactless smart card used to pay fares across multiple public transit systems in the Puget Sound region of Washington State.
-
C.
Opal card
The Opal card is a reusable, contactless smartcard used to pay for public transport across much of New South Wales, Australia.
-
D.
Metro TAP card
The Metro TAP card is a reusable, reloadable smart fare card used for contactless payment across the Los Angeles County public transit system.
-
E.
MetroCard
MetroCard is a magnetic stripe payment card formerly used as the primary method for paying fares on New York City’s public transit system, including subways and buses.
- F. None of above. chosen
Statements (49)
| Predicate | Object |
|---|---|
| instanceOf |
contactless smart card
ⓘ
electronic payment system ⓘ stored-value card ⓘ |
| country |
Hong Kong, China
ⓘ
surface form:
Hong Kong
|
| currency | Hong Kong dollar NERFINISHED ⓘ |
| depositRequired | true ⓘ |
| hasVariant |
Octopus Mobile SIM
NERFINISHED
ⓘ
Octopus for Child ⓘ Octopus for Elder ⓘ Octopus for Student ⓘ Octopus on Apple Pay NERFINISHED ⓘ Octopus on Huawei Pay NERFINISHED ⓘ Octopus on Samsung Pay NERFINISHED ⓘ Octopus on iPhone ⓘ On-Loan Octopus NERFINISHED ⓘ Personalised Octopus ⓘ Sold Octopus ⓘ |
| headquartersLocation | Hong Kong NERFINISHED ⓘ |
| introduced | 1997 ⓘ |
| language |
Chinese
ⓘ
English ⓘ |
| maximumStoredValue | HKD 3000 ⓘ |
| medium | plastic card ⓘ |
| nativeName | 八達通 NERFINISHED ⓘ |
| nativeNameLanguage | zh ⓘ |
| operator | Octopus Cards Limited NERFINISHED ⓘ |
| primaryUse | public transport payment ⓘ |
| region | Hong Kong Special Administrative Region NERFINISHED ⓘ |
| shortName | Octopus NERFINISHED ⓘ |
| technology |
RFID
ⓘ
contactless smart card technology ⓘ |
| topUpMethod |
automatic add-value service
ⓘ
cash ⓘ credit card ⓘ debit card ⓘ |
| use |
MTR fares
ⓘ
access control ⓘ building entry systems ⓘ bus fares ⓘ convenience store payments ⓘ fast food restaurant payments ⓘ ferry fares ⓘ light rail fares ⓘ parking payments ⓘ retail payments ⓘ school attendance systems ⓘ supermarket payments ⓘ tram fares ⓘ |
| website | https://www.octopus.com.hk ⓘ |
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: Octopus card Description of subject: The Octopus card is a rechargeable contactless smart card widely used in Hong Kong for public transport fares and everyday electronic payments.
Referenced by (2)
Full triples — surface form annotated when it differs from this entity's canonical label.
this entity surface form:
Octopus Cards Limited