| title | description | ms.topic | ms.custom | ms.date | author | ms.author | ms.subservice | ||
|---|---|---|---|---|---|---|---|---|---|
Azure Event Grid namespace MQTT functionality terminology |
Describes the key terminology relevant for Event Grid namespace MQTT functionality. |
conceptual |
|
11/15/2023 |
george-guirguis |
geguirgu |
mqtt |
Key terms relevant for Event Grid namespace and MQTT resources are explained.
[!INCLUDE common-namespace-concepts]
Client is a device or an application that can publish and/or subscribe MQTT messages. For more information about client configuration, see MQTT clients.
Certificate is a form of asymmetric credential. They're a combination of a public key from an asymmetric keypair and a set of metadata describing the valid uses of the keypair. If the keypair of the issuer is the same keypair as the certificate, the certificate is said to be "self-signed". Third-party certificate issuers are sometimes called Certificate Authorities (CA). For more information about client authentication, see MQTT client authentication.
Client attributes represent a set of key-value pairs that provide descriptive information about the client. Client attributes are used in creating client groups and as variables in Topic Templates. For example, client type is an attribute that provides the client's type. For more information about client configuration, see MQTT clients.
Client group is a collection of clients. Clients can be grouped together using common client attribute(s). Client groups can be given permissions to publish and/or subscribe to a specific topic space. For more information about client groups configuration, see MQTT client groups.
Topic space is a set of topic templates. It's used to simplify access control management by enabling you to scope publish or subscribe access for a client group, to a group of topics at once instead of individual topics. For more information about topic spaces configuration, see MQTT topic spaces.
An MQTT topic filter is an MQTT topic that can include wildcards for one or more of its segments, allowing it to match multiple MQTT topics. It's used to simplify subscriptions declarations as one topic filter can match multiple topics.
Topic templates are an extension of the topic filter that supports variables. It's used for fine-grained access control within a client group.
A Permission Binding grants access to a specific client group to either publish or subscribe on a specific topic space. For more information about permission bindings, see MQTT access control.
- Learn about creating an Event Grid namespace
- Learn about MQTT broker feature in Azure Event Grid
- Learn more about MQTT clients
- Learn how to Publish and subscribe MQTT messages using Event Grid namespace