See: Description
| Interface | Description | 
|---|---|
| PartitionStrategy | Represents the way edges are assigned to edge partitions based on their source and destination
 vertex IDs. | 
| Class | Description | 
|---|---|
| Edge<ED> | A single directed edge consisting of a source id, target id,
 and the data associated with the edge. | 
| EdgeContext<VD,ED,A> | Represents an edge along with its neighboring vertices and allows sending messages along the
 edge. | 
| EdgeDirection | The direction of a directed edge relative to a vertex. | 
| EdgeRDD<ED> | EdgeRDD[ED, VD]extendsRDD[Edge[ED}by storing the edges in columnar format on each
 partition for performance. | 
| EdgeTriplet<VD,ED> | An edge triplet represents an edge along with the vertex attributes of its neighboring vertices. | 
| Graph<VD,ED> | The Graph abstractly represents a graph with arbitrary objects
 associated with vertices and edges. | 
| GraphLoader | Provides utilities for loading  Graphs from files. | 
| GraphOps<VD,ED> | Contains additional functionality for  Graph. | 
| GraphXUtils | |
| PartitionStrategy.CanonicalRandomVertexCut$ | Assigns edges to partitions by hashing the source and destination vertex IDs in a canonical
 direction, resulting in a random vertex cut that colocates all edges between two vertices,
 regardless of direction. | 
| PartitionStrategy.EdgePartition1D$ | Assigns edges to partitions using only the source vertex ID, colocating edges with the same
 source. | 
| PartitionStrategy.EdgePartition2D$ | Assigns edges to partitions using a 2D partitioning of the sparse edge adjacency matrix,
 guaranteeing a  2 * sqrt(numParts)bound on vertex replication. | 
| PartitionStrategy.RandomVertexCut$ | Assigns edges to partitions by hashing the source and destination vertex IDs, resulting in a
 random vertex cut that colocates all same-direction edges between two vertices. | 
| Pregel | Implements a Pregel-like bulk-synchronous message-passing API. | 
| TripletFields | Represents a subset of the fields of an [[EdgeTriplet]] or [[EdgeContext]]. | 
| VertexRDD<VD> | Extends  RDD[(VertexId, VD)]by ensuring that there is only one entry for each vertex and by
 pre-indexing the entries for fast, efficient joins. |