What are contexts in OpenDialog?

Contexts are information stores that conform to a specific way of behaving (the Context interface) and provide a generic way for the ConversationEngine and the ResponseEngine to store or retrieve attributes.

We support persistent contexts that will be automatically stored together with user information and retrieved as required. This enabes you to store information across multiple interactions.

What type of contexts can you use?

OpenDialog supports a set of contexts out of the box : core contexts, and also allows you to create your own custom contexts.

Core Contexts

"Out of the box" OpenDialog supports the following contexts

  • user - the user context stores attributes against the user node in Dgraph. As such attributes stored in the user context will persist across requests.

  • session - the session context is an in-memory context valid for a single request-response exchange. It is a convenient context to store application specific attributes that are only required within the space of a single request. We use the session context to store messages coming back from external NLU interpreters, for example, so that they can be embedded within a message and displayed to the user.

  • global - the global context is a persistent context that can be managed through the UI. By visiting admin/global-contexts you can add attributes to the global context. These attributes will then be available throughout your application by referencing global.attribute_name

  • conversation - the conversation context is a context that can be managed through the UI.

  • session - the session context is a context that can be managed through the UI.

Custom Contexts

Developers can create custom contexts to store and retrieve relevant information.

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