User:Ádám Harangozó/SPARQL
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FactGrid is a vaste repository of data. Besides looking up specific items in the database, we can also get lists of items by running queries. The language of the queries is called SPARQL. You can reach this method of searching under "Query service" in the left menu.
By using SPARQL, you will be able to formulate questions like:
- Who are all the people who lived in Gotha in the 19th century?
- What are all the events that happened in 1889?
- Which city is mentioned the most in the correspondence of the Illuminati?
- I have a class of items (like all humans) and want to extract information from all items in this group (that is the trivial one)
- I mant to limit this group and get information about this smaller group
- I want to run queries on two or more groups
- I am looking for all items that have a certain property (like a FactGrid account) and want more information about these (still easy)
- I have a group of items and am interested in a particular property - and want this with all the qualifiers.
- I am interested in particular qualifiers - as in all people who studied in Göttingen in the 1770s
- I want a timeline with the different spans of time during which an organisation was active (see Q10575)
- I want a timeline with the different names of an organisation (see Q10575)
...
Sources
Further reading