OGraph (Open Graph Protocol)

Inspired by OData, Graph Data Models, and ChilliCream's GraphQL framework, OGraph is an open source protocol built over HTTP intended to provide the ability to query data similarly to GraphQL while maintaining REST.

With the world moving towards micro-everything, the push for Graph based solutions has become very prevalent in today solutions.

Key Features

Comparisons

OData vs OGraph

Data Modeling A key benefit OData has over GraphQL is the ability to extract the EDM (Entity Data Model) over the web. OGraph seeks to provide a similar approach to an EDM (Entity Data Model) via a Graph Data Model. Rather than create hard relationships between

GraphQL vs OGraph

combing the flexibility built for the service/application layer meant for virtualized graph services that allow for interoperable and queryable REST APIS.

Purpose: OGraph serves a virtualization of your app-layer architecture utilizing graph modeling concepts while offering secure accessible querying operations out of the box.

By creating a cohesive service/application across in-cohesive data-layer, it allows for easy comprehensions of a complex system.

Most companies as they grow tend to integrate various data stores that either don't fully talk each or have a vary difficult

such as SQL Server, MongoDB, Neo4J, and t When it comes to building any type of HTTP services many of the following concerns have to be addressed in all application development life-cycles:

• Request/Response: having an understanding of what to expect and what to send.
• Query Accessibility: being able to easily support and standardized queryable data that is read-only and flexible enough to implement field level security.

Utilizes concepts of the following technologies:

• GraphQL
• OData
• Stardog

Limitations

• Service-to-service query
• Degree of Separation: Unlike a

What does OGraph hope to achieve ?

1. To allow interoperable and queryable REST APIs
2. To visualize your REST services in a Graph Model
3. To structure data in terms of a Graph Data Model which can be accessible over the web
4. To maintain REST yet allow flexible query operations and data resolution like GraphQL

Terminology:

• Node/Vertex:
• Arc: represents a collection of nodes
  • Head:
  • Tail:
• Label:

$select( firstName, lastName, middleName )& $where(

)

OGraph Model

Resolvers

There are three types of resolvers

• Operation Resolver
• Property Resolver(s)
• Edge Resolver(s)

Project Dependencies

├── Assimalign.OGraph.Sdk.csproj
│   ├── Assimalign.OGraph.Server.csproj
│   │   └── Assimalign.OGraph.Core.csproj
│   │       ├── Assimalign.OGraph.Gdm.csproj
|   │       └── Assimalign.OGraph.Syntax.csproj
│   └── Assimalign.OGraph.Server.csproj
│       └── Assimalign.OGraph.Core.csproj
│           ├── Assimalign.OGraph.Gdm.csproj
│           └── Assimalign.OGraph.Syntax.csproj