| Name | Description | Type | Package | Framework |
| QuadGraphCountMapper | A mapper for counting graph node usages within quads designed primarily for use in conjunction with NodeCountReducer. | Class | mapred.org.apache.jena.hadoop.rdf.mapreduce.count.positional | Apache Jena |
| QuadObjectCountMapper | A mapper for counting object node usages within quads designed primarily for use in conjunction with NodeCountReducer | Class | mapred.org.apache.jena.hadoop.rdf.mapreduce.count.positional | Apache Jena |
| QuadPredicateCountMapper | A mapper for counting predicate node usages within quads designed primarily for use in conjunction with NodeCountReducer | Class | mapred.org.apache.jena.hadoop.rdf.mapreduce.count.positional | Apache Jena |
| QuadSubjectCountMapper | A mapper for counting subject node usages within quads designed primarily for use in conjunction with NodeCountReducer | Class | mapred.org.apache.jena.hadoop.rdf.mapreduce.count.positional | Apache Jena |
| TripleObjectCountMapper | A mapper for counting object node usages within triples designed primarily for use in conjunction with NodeCountReducer | Class | mapred.org.apache.jena.hadoop.rdf.mapreduce.count.positional | Apache Jena |
| TriplePredicateCountMapper | A mapper for counting predicate node usages within triples designed primarily for use in conjunction with NodeCountReducer | Class | mapred.org.apache.jena.hadoop.rdf.mapreduce.count.positional | Apache Jena |
| TripleSubjectCountMapper | A mapper for counting subject node usages within triples designed primarily for use in conjunction with NodeCountReducer | Class | mapred.org.apache.jena.hadoop.rdf.mapreduce.count.positional | Apache Jena |