ericcatlin / anne

A example ANNE stack app (AngularJS, NodejS, Neo4j, Express)

ANNE

A example ANNE stack app (AngularJS, NodejS, Neo4j, Express)

Accompanying the standard npm neo4j driver is a custom JS Graph Manipulation library in /API/src/lib/graph.js

This js library standardizes a method of interacting with graph data allowing for Addition, Subtraction, and the computation of differences between any 2 subgraphs.

Subgraph - Standard collection of Nodes and Rels

{"nodes":{"uuid":"NodeObject"}, "rels":{"uuid":"RelObject"}}

Node - Standard Node Object

{"labels":[], "properties":{"uuid":"string", "arbitrary_props":""}}

Rel - Standard Relationship object

{"type":"type_string", "properties":{"uuid":"string", "arbitrary_props":""}, "from_id" : "uuid", "to_id":"uuid"}

Subgraph Indexes - These additional fields add no additional information to the Subgraph but do provide convenient O(1) lookups within the subgraph

{"nodes":{"uuid":"NodeObject"}, "rels":{"uuid":"RelObject"}, "node_label_index":{"label":["uuid_array"]}, "incoming":{"rel_type":{"to_node_uuid":["rel_uuid_array"]}}, "outgoing":{"rel_type":{"from_node_uuid":["rel_uuid_array"]}} }

Differences - Computed differences between any two Subgraphs.

{"Extra":"Subgraph", "Missing":"Subgraph", "Updated":{"nodes":{"updated":{"prop_titles":["node_uuid_array"]},"new":{"prop_titles":["node_uuid_array"]},"missing":{"prop_titles":["node_uuid_array"]}}, "rels":{"updated":{"prop_titles":["rel_uuid_array"]},"new":{"prop_titles":["rel_uuid_array"]},"missing":{"prop_titles":["rel_uuid_array"]}}}}

These JS Graph Management structures power the ANNE Stack operations, and can be performed Client-Side or Server-Side giving a standard messaging model to update state in either the DB or within a client application