Identifiers

On this site each record has a page at data.qipu.org/usa/san-francisco/record/?id=<id>, and its JSON document is served at https://tiles.qipu.org/data/sf/<kind>/<slug>. The data.qipu.org/sf/… addresses named below are not mapped yet.

qipu:sf/place/address/eas-289463        680 Haight St (DataSF EAS id)
qipu:sf/place/parcel/0847-019           assessor block 0847, lot 019
qipu:sf/place/block/0847                assessor block
qipu:sf/place/street/haight-st          a street;  qipu:sf/place/street/geary = "Geary" printed without its type
qipu:sf/place/hood/western-addition     neighbourhood (DataSF Analysis Neighborhoods)
qipu:sf/place/creek/islais-creek        a feature (approximate geometry)
qipu:sf/place/burn-zone/1906            the area burned in 1906
qipu:sf/person/dianne-feinstein         a person
qipu:sf/instrument/ord/1975-338         an ordinance (res|ord|bill / <year>-<number>)
qipu:sf/decision/<volume>|<item>        a decision (an item in a Journal)
<identifier>:<leafNum>                  a page: IA's leaf number (the jp2 / IIIF number), not the BookReader display index
c:<32 hex>                              a claim: 128 bits, hashed from its slot (subject, property, object, page, role), not from the reading

• Ids are never reused and never deleted. A merged or retired id gets a row in id_redirects and keeps resolving.
• A place id is the place, not its state (Open Library's work vs edition): names, numbers, buildings and occupants change; they are claims about the place, each dated and sourced.
• Claim ids changed between v0.2 and v0.3 (to slot hashes); no corrections pointed at them yet. From v0.3 on they are meant to stay.
• Every place, person and instrument id resolves to a JSON document: qipu:sf/person/dianne-feinstein → https://data.qipu.org/sf/person/dianne-feinstein (staging: https://tiles.qipu.org/data/sf/...).