Editing AppView (section)

=== Record Processing and Indexing ===
The AppView consumes the firehose from a [[relay]] and processes [[records]] relevant to its specific application domain. For  example, for the [[Bluesky]] social app, this means handling records in the <code>com.atproto</code> and <code>app.bsky</code> [[lexicon]] namespaces. The service validates each record against its schema, ensuring data integrity before indexing.

As it processes records, the AppView builds sophisticated indices and aggregations. It counts likes on posts, collates threads of replies, maintains follower relationships, and constructs personalized timelines. These computations transform the raw repository data into the social graph and content structures that users expect from a social network.

The AppView tracks the most recent processed revision for each repository and handles record and account-level deletions appropriately. It also enforces application-level constraints and deduplicates graph relationships when necessary, such as preventing duplicate follows or likes.