2.2.4.3 Value Metadata
Value metadata is metadata associated with the value of a particular cell. Value metadata is associated with a cell through a BrtValueMeta (section 2.4.845) record, or with an External Cell (section 2.2.7.4.1.2.1) through a BrtExternValueMeta (section 2.4.668) record. Either record references a metadata block (section 2.2.4.5) containing value metadata within the metadata part (section 2.1.7.34).