On 28/12/13 19:19, Daniel Maatari Okouya wrote:
I saw the previous answer to the question posted in 2011 about the
difference between a dataSet and a dataSource. I would like to
further clarify that point:
You have the TDB and the ARQ API both can create DataSet but only ARQ
can create DataSource.
DataSource no longer exists - all the functionality has been absorbed
into Dataset.
I want to use AQR to query my dataset/Source. Currently my dataSet is
one that was created with the TDB API because i learned it before
ARQ.
But in learning ARQ i saw this dataSource which they say is
updatable. This is confusing to me for the following reasons.
I have been so far able programmatically to create NamedModels with
TDB.DataSet. When it comes to the defaultGraph i can not set it.
Nevertheless to add triples to it, i just get the defaultModel, and
add(..) triples from another in memory model.
That will do fine.
You never have to add or create the default graph/model.
For named graphs, it's only storage systems (e.g. in-memory, or datasets
are that combinations of models from different other storage systems)
where when you add a graph you are also adding the storage.
In TDB, Dataset.getNamedModel(uri) will always return a Model you can
update. For TDB, addNamedModel is a copy of the data into the database.
Andy
Hence i would like to know what would be the advantage of using, ARQ
dataSet and most importantly DataSource ?
Many thanks,
Maatary
-- Daniel Maatari Okouya Sent with Airmail
