API Reference > imodeljs-common > Tile > TileVersionInfo > formatVersion formatVersion formatVersion: number The exact version of the "iMdl" tile format used by the backend when generating tile content. Newer versions of the tile format remain backwards-compatible, but may fix bugs from previous versions and add new features. A frontend can request tiles of an earlier version than this, but should not of newer versions. note The version is represented as a 32-bit integer combining the 16-bit major and minor version numbers. see CurrentImdlVersion to obtain the current version used by the frontend or backend. Defined in core/common/src/TileProps.ts Line 71 Last Updated: 12 June, 2024