Update of rdf-Vocabulary README.md

README.md

-# rdfunl
+# rdf-Vocabulary
 
-java library of rdfunl schema
+Java library of rdfunl schema
 
 includes rdf schema and schemagen the jena tools to generate java file associated to the rdf schema.
 
-Execute schemagen to produce/update RdfUnlSchema.java file
+1. Install maven 3 or higher
+2. Clone the repository
+3. Go to project directory
+4. Modify the file "rdf-vocabulary/src/main/vocabs/unlVocabulary.ttl"
+5. Run command ```mvn package``` to compile and create package
 
-```{sh}
-./apache-jena-3.14.0/bin/schemagen -i rdfunl-schema.ttl -o RdfUnlSchema.java
-````
+At the end of 5th steps the command should be equivalent to the following :
+```shell script
+[INFO] Building jar: <fullDirectoryPathToProjects>/rdf-vocabulary/rdf-vocabulary/target/rdf-vocabulary-1.0-SNAPSHOT.jar
+[INFO] ------------------------------------------------------------------------
+[INFO] Reactor Summary for rdf-vocabulary 1.0-SNAPSHOT:
+[INFO] 
+[INFO] rdf-vocabulary ..................................... SUCCESS [  0.008 s]
+[INFO] rdf-vocabulary-classes ............................. SUCCESS [  6.617 s]
+[INFO] ------------------------------------------------------------------------
+[INFO] BUILD SUCCESS
+[INFO] ------------------------------------------------------------------------
+[INFO] Total time:  6.837 s
+[INFO] Finished at: 2020-05-24T17:44:25+02:00
+[INFO] ------------------------------------------------------------------------
+```
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