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Questions tagged [allegrograph]

AllegroGraph is a closed source graph database (triple store) created by Franz Inc. that supports semantic web standards like RDF, SPARQL, JSON-LD and SHACL.

AllegroGraph is a graph database (triple store) created by Franz Inc. written in in development since 2006. The latest release is v6.6.0.

It supports standards like , , , and , and integration with and .

The server runs exclusively on and offers a web-based client to manage repositories and issue SPARQL queries.

There are based open-source clients available for , , , , , and .

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Does Sails.js or Meteor.js work with ArangoDB or OrientDB?

I'm planning to work on a social site and I would like to leverage both a document and graph database for all of the desired features. Is there a way to get Meteor.js or Sail.js (or any better) to work with ArangoDB or OrientDB? Or should I just…
Quanterreo Cutter
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Difference between graph database: Neo4j & AllegroGraph

What is the difference between these two graph databases: Neo4j and AllegroGraph? Which is better for Java Web programming?
Erwin
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Define rules for AllegroGraph triples and how to apply them

I'm using AllegroGraph to store statement like this: I would like to define a rule on this staments that says: if the subject newsid1 hasAnnotation either Gamma or Beta, then add a new…
florins
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Match where value is NULL in SPARQL

I have the following SPARQL query: SELECT ?label ?img WHERE { ?uri rdfs:label ?label . ?uri vtio:hasImage ?img . } With results like the following: label | img ------------- label | link1 labe2 | link2 … I also want the label without ?img…
Do Thanh Tung
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How to store RDF graphs within a data storage?

I want to write a web app with rails what uses RDF to represent linked data. But I really don't know what might be the best approach to store RDF graphs within a database for persistent storage. Also I want to use something like paper_trail to…
sn3ek
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How to traverse RDF tree in SPARQL and find connections outside of the tree?

Considering a tree with the root node "A" and "hasChild" relationships (e.g. product structure) as following: Target is to find out: What nodes have parents outside of the tree? In this case the answer should be ‘B’ and ‘Q’ as they have parents…
Grapheneer
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Strange SPARQL behavior using variables vs. IRI

I'm facing a strange behavior using Allegrograph 4.13 This is the data for test case prefix : INSERT DATA { :A rdfs:label "A" . :A :hasProp :Prop1 . :Prop1 :Key "1" . :Prop1 :Value "AA" . :B :hasProp :Prop2…
Andrej
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Sparql - Concatenation fails if any one variable is not bound

Hi am using AllegroGraph and Sparql query to retrieve the results. This is a sample data that reproduces my issue. Consider below data where a person has first, middle and last names. …
John Jai
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SWI-Prolog Semantic Web Library and Python Interface

I want to write a Python web application that queries RDF triples using Prolog. I found pyswip for interfacing Python with SWI-Prolog, and I am currently looking into SWI-Prolog's RDF capabilities. I am wondering if anyone has tried this…
John Thompson
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How to define a SPIN rule?

I am using AllegroGraph 4.4. I have their sample database input regarding the Kennedy family tree. I have copied an example from their tutorials on SPIN. Here it is: (ag.spin:register-spin-function !ex:age "prefix kennedy:…
Dragos
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what's the difference between allegrograph and five column mysql table?

Allegrograph is basically a RDF triple(actually five field) store. Then why can't we create a MySQL table with five columns and store the triples in them. ? What features does AG have over such MySql table ?
nidheeshdas
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RDF reading/parsing errors

I have some RDF files which I want to import into a tripplestore(AllegroGraph), but at the first file I get a SAX parser error, stating there is an unrecognized character. After removing the line in question, everything is great. Then I have tried…
Dragos
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Allegrograph - Functors like RDF objects properties?

Using Allegrograph, Prolog functors are pretty awesome, but there is one downside. Let's say you define a functor that links two entities, for example parentOf which equals to "!n:motherOf OR !n:fatherOf" which are both rdf object properties…
Aymeric
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Is there a way to convert GraphQL queries in a Java server to SPARQL queries?

I have an AllegroGraph database which stores RDF data. The only way to retrieve these data is through SPARQL queries. The external API I have is GraphQL (it will be in Java server). Is there a way that I can connect GraphQL Java server to…
JEE_program
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Which namespace for Math functions in SPARQL?

I'm currently developing a project in which I use AllegroGraph as graph database. AllegroGraph provides full support for SPARQL 1.1 Query and Update. I'm trying to write a SPARQL query in which I need some math functions (such as square root and so…
Saint Santo
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