ISCC - Types and Constants

MT

MT - MainTypes

Uint	Symbol	Bits	Purpose
0	META	0000	Match on metadata similarity
1	SEMANTIC	0001	Match on semantic content similarity
2	CONTENT	0010	Match on perceptual content similarity
3	DATA	0011	Match on data similarity
4	INSTANCE	0100	Match on data identity
5	ISCC	0101	Composite of two or more ISCC-UNITs with common header
6	ID	0110	Short unique identifier bound to ISCC, timestamp, pubkey
7	FLAKE	0111	Unique time, randomness and counter based distributed ID

ST

ST - SubTypes

Uint	Symbol	Bits	Purpose
0	NONE	0000	For MainTypes that do not specify SubTypes

ST_CC

ST_CC

SubTypes for MT.CONTENT

Uint	Symbol	Bits	Purpose
0	TEXT	0000	Match on syntactic text similarity
1	IMAGE	0001	Match on perceptual image similarity
2	AUDIO	0010	Match on audio chroma similarity
3	VIDEO	0011	Match on perceptual similarity
4	MIXED	0100	Match on similarity of content codes

ST_ISCC

ST_ISCC

SubTypes for MT.ISCC

Uint	Symbol	Bits	Purpose
0	TEXT	0000	Composite ISCC inlcuding Text-Code
1	IMAGE	0001	Composite ISCC inlcuding Image-Code
2	AUDIO	0010	Composite ISCC inlcuding Audio-Code
3	VIDEO	0011	Composite ISCC inlcuding Video-Code
4	MIXED	0100	Composite ISCC inlcuding Mixed-Code
5	SUM	0101	Composite ISCC inlcuding only Data- and Instance-Code
6	NONE	0110	Composite ISCC including Meta, Data and Instance-Code

ST_ID

ST_ID

SubTypes for MT.ID

Uint	Symbol	Bits	Purpose
0	PRIVATE	0000	ISCC-ID minted via private repository (not unique)
1	BITCOIN	0001	ISCC-ID minted via Bitcoin blockchain
2	ETHEREUM	0010	ISCC-ID minted via Ethereum blockchain
3	POLYGON	0011	ISCC-ID minted via Polygon blockchain

VS

VS - Version

Code Version

Uint	Symbol	Bits	Purpose
0	V0	0000	Initial Version of Code without breaking changes

LN

LN - Length

Valid lengths for hash-digests.

MULTIBASE

Supported Multibase encodings.