# Materialized View A materialized view is a stored result derived from canonical data so repeated reads are fast. It can be refreshed or rebuilt when the source changes. Bryant's `MASTER` language indexes, static HTML outputs, SQLite read projections, generated quote pages, and search indexes all fit this family. The crucial discipline is to keep the canonical source and derivation rules recoverable. Related: [[wiki/Rebuildable Projection|Rebuildable Projection]], [[wiki/Offline Precomputation|Offline Precomputation]], [[wiki/Read-Write Separation|Read-Write Separation]].