Fuseki provides a number of “data services” - each data service is an RDF datasets and a configurable set of endpoints for various operations such as SPARQL query, SPARQL update and file upload.
URI scheme. Datasets and services Admin
Query update GSP including direct naming for GSP
in addition:
Dataset as a set of quads.
@@ Just rough notes : out-of-date and inconsistent
The naming style for application operations is:
/ name / endpoint ? parameters
where name is
and endpoint is
In the administration operations, the name is used after the
/$/
e.g.
In administration operations, the dataset name is appended to the operation. For example, http://host:port/$/datasets/ds accesses the assembler description of the dataset.
There is also an internal name, generated by the server which is a UUID. This UUID is never reused even if the dataset name is reused after the first use is deleted.
Service
GEThttp://host:port/dataset?query=.. POST http://host:port/dataset Content-type: application/sparql-query
POST http://host:port/dataset?update=... POST http://host:port/dataset?update
or
POST http://host:port/dataset Content-type: application/sparql-update
http://host:port/dataset?default http://host:port/dataset?graph=...
The lifecycle of a dataset
An active dataset is able to process applications requests.
An offline dataset is one whose configuration is know to the server but is currently not controlled by the server.
When offline, the dataset is unavailable for application requests but the name remains in-use and the configuration information retained. When made active again, the dataset and it's associated services are recreated. When offline, Fuseki does not retain any access to the data so the dataset can be changed with tools outside of Fuseki. When active, Fuseki assumes it has full control of a dataset (in particular TDB datasets can not be updated by other applications while active).
When Fuseki is not running, all datasets can be considered offline even if they were not explicitly made so prior to shutdown of the server.
(If a dataset uses in-memory storage, changes to its state are lost even though it is recreated from its; configuration when the server restarts.)