What geographical entities of a defined type exist at a given time?
The list of geographical features according to the given type (street, district, etc.) with their period name.
Question: What roads existed in Paris in 1860?
Answer:
addr:LM_00534107-721b-49b6-b126-98b5fe0681a6,"rue de Rochechouart"@fr
...
addr:LM_99c2ec65-89d1-404e-93a1-6b1cbd68ed5a,"place du Trône"@fr
Over which time interval(s) is a given name address valid?
A list of time intervals giving the validity of the address.
Question: In which years can we find the address that reads ‘3 rue de la vieille place aux veaux’?
Answer: the years when this address existed under the name ‘3 rue de la vieille place aux veaux’, represented in the form of one (or more) time interval(s) : [1646-1855]
What is the history of a landmark?
There are two alternatives:
- (a) what events are associated with it?
- (b) what states are associated with it?
A list of events describing changes to the benchmark (a) or a list of ordered versions each describing the benchmark over a given time interval (b).
Question: What is the history of the Place de la Nation?
Answers :
(a)
1728 : place du Trône is created
10 August 1792 : name change from place du Trône to place du Trône Renversé
around 1814 : name change from place du Trône Renversé to place du Trône
2 July 1880 : name change from place du Trône to place de la Nation
(b)
- [1728,1792-08-10] :
- name : place du Trône
- geometry : "POLYGON(...)"
- location : former 8th arrondissement of Paris
- ...
- [1880-07-02,...] :
- name : place de la Nation
- geometry : "POLYGON(...)"
- location : 11th et 12th arrondissement of Paris
What states and events are missing from an address history?
A list of ‘phantom’ states (respectively events) and the events (respectively states) to which they are linked.