ISO 8601:2000(E)

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© ISO 2000 ­ All rights reserved

5.2.1.3

Truncated representations

If, by agreement, truncated representations are used the basic formats shall be as specified below. In each case

hyphens that indicate omitted components shall be used only as indicated or shall be omitted.

a) A specific date in the implied century

Basic format:

YYMMDD

EXAMPLE 850412

Extended format:

YY-MM-DD

EXAMPLE 85-04-12

b) A specific year and month in the implied century

Basic format:

-YYMM

EXAMPLE -8504

Extended format:

-YY-MM

EXAMPLE -85-04

c) A specific year in the implied century

Basic format:

-YY

EXAMPLE -85

Extended format:

not applicable

d) A specific day of a month in the implied year

Basic format:

--MMDD

EXAMPLE --0412

Extended format:

--MM-DD

EXAMPLE --04-12

e) A specific month in the implied year

Basic format:

--MM

EXAMPLE --04

Extended format:

not applicable

f) A specific day in the implied month

Basic format:

---DD

EXAMPLE ---12

Extended format:

not applicable

NOTE

5.2.1.3 includes the definition of representations that are truncated and have reduced precision.

5.2.1.4

Expanded representations

If, by agreement, expanded representations are used, the basic formats shall be as specified below. In the examples

below it has been agreed to expand the time element year with two digits.

a) A specific day

Basic format:

±

YYYYYMMDD

EXAMPLE +0019850412

Extended format:

±

YYYYY-MM-DD

EXAMPLE +001985-04-12

b) A specific month

Basic format:

±

YYYYY-MM

EXAMPLE +001985-04

Extended format:

not applicable

c) A specific year

Basic format:

±

YYYYY

EXAMPLE +001985

Extended format:

not applicable

d) A specific century

Basic format:

±

YYY

EXAMPLE +0019

Extended format:

not applicable

NOTE

5.2.1.4 includes the definition of representations that both expanded and have reduced precision.