graphstore | Fast in-memory graph structure , powering Gephi
kandi X-RAY | graphstore Summary
kandi X-RAY | graphstore Summary
GraphStore is an in-memory graph structure implementation written in Java. It's designed to be powerful, efficient and robust. It's powering the Gephi software and supports large graphs in intensive applications.
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Top functions reviewed by kandi - BETA
- Copies the given nodes from the given set of nodes
- Compares two configuration objects
- Adds a new column to the table
- Create the standard index for the given column
- Serialize to array of edges
- Returns an array containing all of the elements in this store
- Create memory
- Inserts the inner element at the end of the array
- Returns an array of NodeImpl objects
- Returns an array containing all of the nodes in this store
- Gets all elements in the given interval
- Generates a KotbergGraph
- Removes all of the elements in the specified collection
- Gets the max timestamp
- Removes all elements in the specified collection that are contained in the specified collection
- Returns the minimum value in the list
- Creates a Runnable that is not writable
- Returns the maximum value in the list
- Returns a Runnable thatwrites all read - writes
- Fair write only
- Returns a Runnable that will be reread only once
- Partitions the thread to evenly read writes
- Fair - read only
- Iterate over an empty set
- Iterate over the bit vector
- Compares this interval with another interval
graphstore Key Features
graphstore Examples and Code Snippets
Community Discussions
Trending Discussions on graphstore
QUESTION
Is it possible that the relationships of the data in a RDF graphstore are different from that defined in an ontology?
For example, let's say the ontology says for a class Person, it has the following attributes,
...ANSWER
Answered 2020-Feb-21 at 00:39RDF is schema-less, that is one of the major differences to e.g. relational databases. This also answers your other questions, there is no fixed schema in a triple store, and a triple store just has to store those triples - how they do it internally doesn't matter.
As for DBpedia: it uses mapping templates that define how to map data from Wikipedia infoboxes to RDF. And those reuse classes and properties from the DBpedia ontology.
The role of an ontology in this context is mostly descriptive, that is it defines a recommended vocabulary and structure for knowledge sharing. But it does not restrict you to only use that particular vocabulary.
QUESTION
I'm trying to run the sample code from the EasyRDF library with Apache Jena Fuseki, but the following error occurs when entering data into the database:
Fatal error: Uncaught exception 'EasyRdf_Exception' with message 'HTTP request for http:// localhost:3030/test/update?graph=http%3A%2F%2Flocalhost%3A3030%2Ftest%2Ftime.rdf failed: Must be application/sparql-update or application/x-www-form-urlencoded (got application/n-triples)' in D:\Files\xampp\htdocs\test\easyrdf-0.9.0\lib\EasyRdf\GraphStore.php:152 Stack trace: #0 D:\Files\xampp\htdocs\test\easyrdf-0.9.0\lib\EasyRdf\GraphStore.php(217): EasyRdf_GraphStore->sendGraph('POST', Object(EasyRdf_Graph), 'time.rdf', 'ntriples') #1 D:\Files\xampp\htdocs\test\graphstore.php(34): EasyRdf_GraphStore->insert(Object(EasyRdf_Graph), 'time.rdf') #2 {main} thrown in D:\Files\xampp\htdocs\test\easyrdf-0.9.0\lib\EasyRdf\GraphStore.php on line 152
Follow the code:
...ANSWER
Answered 2018-Apr-24 at 07:38You are mixing up the SPARQL 1.1 Protocol and the SPARQL 1.1 Graph Store HTTP Protocol.
The difference is that the latter doesn't use SPARQL queries to perform operations on RDF graphs.
For every protocol, Fuseki exposes two URIs: for read and for write operations.
Thus, if you want to use the SPARQL 1.1 Graph Store HTTP Protocol, you should write:
QUESTION
I have a store that performs a fetch
to get graph data from my server using asyncAction
from mobx-utils.
It looks like this:
...ANSWER
Answered 2017-Oct-31 at 04:52There are many ways to do it, but I would utilize the object oriented nature of MobX, and create one data store, that is instantiated and passed down as a provider to all components. You can see this as your "local db" if you will.
Then just add methods on that data store to fetch and create different instances of Graphs.
Here's some example code (no typescript)
Community Discussions, Code Snippets contain sources that include Stack Exchange Network
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GraphStore uses Maven for building.
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