| skin layer | skin PHP and CSS | ||||||
| style layer | wikitext | ||||||
| transclusion layer | templates | ||||||
| database layer | swFilter / swQuery | ||||||
| object layer | swWiki | swUser | |||||
| swRecord | |||||||
| swPersistance | swDB | swBitmap | swParser | swFunction | |||
| physical layer | revisions | current | files | cache | indexes | bloom | queries |