OptionalextensionsDictionary object with extension-specific objects
OptionalextrasApplication-Specific data
The index of the bufferView with sparse indices. Referenced bufferView can't have ARRAY_BUFFER or ELEMENT_ARRAY_BUFFER target
OptionalbyteThe offset relative to the start of the bufferView in bytes. Must be aligned
The indices data type. Valid values correspond to WebGL enums: 5121 (UNSIGNED_BYTE), 5123 (UNSIGNED_SHORT), 5125 (UNSIGNED_INT)
Indices of those attributes that deviate from their initialization value