Anonymitaet commented on code in PR #671:
URL: https://github.com/apache/pulsar-site/pull/671#discussion_r1287851146


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docs/concepts-messaging.md:
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@@ -486,13 +492,20 @@ If no tenant or namespace is specified when a client 
creates a topic, the topic
 
 ## Namespaces
 
-A namespace is a logical nomenclature within a tenant. A tenant creates 
namespaces via the [admin API](admin-api-namespaces.md#create-namespaces). For 
instance, a tenant with different applications can create a separate namespace 
for each application. A namespace allows the application to create and manage a 
hierarchy of topics. The topic `my-tenant/app1` is a namespace for the 
application `app1` for `my-tenant`. You can create any number of 
[topics](#topics) under the namespace.
+Pulsar namespaces are logical groupings of topics. A namespace is a logical 
nomenclature within a tenant. A tenant creates namespaces via the [admin 
API](admin-api-namespaces.md#create-namespaces). For instance, a tenant with 
different applications can create a separate namespace for each application. A 
namespace allows the application to create and manage a hierarchy of topics. 
The topic `my-tenant/app1` is a namespace for the application `app1` for 
`my-tenant`. You can create any number of [topics](#topics) under the namespace.
 
 ## Subscriptions
 
-A subscription is a named configuration rule that determines how messages are 
delivered to consumers. Four subscription types are available in Pulsar: 
[exclusive](#exclusive), [shared](#shared), [failover](#failover), and 
[key_shared](#key_shared). These types are illustrated in the figure below.
+A Pulsar subscription is a lease on a topic established by a group of 
consumers, it is a named configuration rule that determines how messages are 
delivered to consumers. There are four available subscription types in Pulsar:

Review Comment:
   same as https://github.com/apache/pulsar-site/pull/671#discussion_r1287836845



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