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https://github.com/SANSA-Stack/SANSA-Stack
Big Data RDF Processing and Analytics Stack built on Apache Spark and Apache Jena http://sansa-stack.github.io/SANSA-Stack/
https://github.com/SANSA-Stack/SANSA-Stack
apache-jena apache-spark distributed-computing flink rdf semantic-web spark
Last synced: about 1 month ago
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Big Data RDF Processing and Analytics Stack built on Apache Spark and Apache Jena http://sansa-stack.github.io/SANSA-Stack/
- Host: GitHub
- URL: https://github.com/SANSA-Stack/SANSA-Stack
- Owner: SANSA-Stack
- License: apache-2.0
- Created: 2015-11-08T07:07:12.000Z (about 9 years ago)
- Default Branch: develop
- Last Pushed: 2024-10-11T08:56:25.000Z (3 months ago)
- Last Synced: 2024-10-30T06:00:07.834Z (2 months ago)
- Topics: apache-jena, apache-spark, distributed-computing, flink, rdf, semantic-web, spark
- Language: Scala
- Homepage: http://sansa-stack.net
- Size: 65.2 MB
- Stars: 141
- Watchers: 22
- Forks: 30
- Open Issues: 39
-
Metadata Files:
- Readme: README.md
- License: LICENSE
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README
# SANSA-Stack
[](https://github.com/SANSA-Stack/SANSA-Stack/actions?query=workflow%3ACI)
[](https://opensource.org/licenses/Apache-2.0)
[](https://twitter.com/SANSA_Stack)
This project comprises the whole Semantic Analytics Stack (SANSA). At a glance, it features the following functionality:
* Ingesting RDF and OWL data in various formats into RDDs
* Operators for working with RDDs and data frames of RDF data at various levels (triples, bindings, graphs, etc)
* *Transformation* of RDDs to data frames and *partitioning* of RDDs into R2RML-mapped data frames
* Distributed SPARQL querying over R2RML-mapped data frame partitions using RDB2RDF engines (Sparqlify & Ontop)
* Enrichment of RDDs with inferences
* Application of machine learning algorithms
For a detailed description of SANSA, please visit http://sansa-stack.net.
## Layers
The SANSA project is structured in the following five layers developed in their respective sub-folders:
* [RDF](sansa-rdf)
* [OWL](sansa-owl)
* [Query](sansa-query)
* [Inference](sansa-inference)
* [ML](sansa-ml)
## Release Cycle
A SANSA stack release is done every six months and consists of the latest stable versions of each layer at this point. This repository is used for organising those joint releases.
## Usage
### Spark
#### Requirements
We currently require a Spark 3.x.x with Scala 2.12 setup. A Spark 2.x version can be built from source based on the [spark2](https://github.com/SANSA-Stack/SANSA-Stack/tree/spark2) branch.
#### Release Version
Some of our dependencies are not in Maven central (yet), so you need to add following Maven repository to your project POM file `repositories` section:
```xml
maven.aksw.internal
AKSW Release Repository
http://maven.aksw.org/archiva/repository/internal
true
false
```
If you want to import the full SANSA Stack, please add the following Maven dependency to your project POM file:
```xml
net.sansa-stack
sansa-stack-spark_2.12
$LATEST_RELEASE_VERSION$
```
If you only want to use particular layers, just replace `$LAYER_NAME$` with the corresponding name of the layer
```xml
net.sansa-stack
sansa-$LAYER_NAME$-spark_2.12
$LATEST_RELEASE_VERSION$
```
#### SNAPSHOT Version
While the release versions are available on Maven Central, latest SNAPSHOT versions have to be installed from source code:
```bash
git clone https://github.com/SANSA-Stack/SANSA-Stack.git
cd SANSA-Stack
```
Then to build and install the full SANSA Spark stack you can do
```bash
./dev/mvn_install_stack_spark.sh
```
or for a single layer `$LAYER_NAME$` you can do
```bash
mvn -am -DskipTests -pl :sansa-$LAYER_NAME$-spark_2.12 clean install
```
Alternatively, you can use the following Maven repository and add it to your project POM file `repositories` section:
```xml
maven.aksw.snapshots
AKSW Snapshot Repository
http://maven.aksw.org/archiva/repository/snapshots
false
true
```
Then do the same as for the release version and add the dependency:
```xml
net.sansa-stack
sansa-stack-spark_2.12
$LATEST_SNAPSHOT_VERSION$
```
## How to Contribute
We always welcome new contributors to the project! Please see [our contribution guide](http://sansa-stack.net/contributing-to-sansa/) for more details on how to get started contributing to SANSA.