HL7 data types used in POU

HL7 Data Type	Definition	Description	Composition
CK	Composite ID with Check Digit	This data type is used for certain fields that commonly contain check digits.	<ID Number>^<Check Digit>^<Code identifying the check digit scheme>^ <assigning authority>
CM	Composite	A field that is a combination of other meaningful data fields.
CX	Extended Composite ID with Check Digit	Extended CK.	<ID Number>^<Check Digit>^<Code identifying the check digit scheme>^ <assigning authority>^<identifier type code>^<assigning facility>
EI	Entity Identifier	It defines a given entity within a specified series of identifiers.	<Entity identifier>^<Namespace ID>^ <universial ID>^<universal ID type>
ID	Coded value for HL7 defined table	The value follows the formatting rules for an ST field except that it is drawn from a table of legal values.
NM	Numeric	A number represented as a series of ASCII numeric characters consisting of an optional leading sign (+ or -), the digits, and an optional decimal point.
PN	Person Name	This data type includes multiple free text components with each component specified as an HL7 ST data type.	<Family name>^<Given Name>^<Middle Initial>^<Suffix>^ <Prefix>^<Degree>
ST	String Data	String data is left justified with trailing blanks optional; This covers any displayable ASCII characters. This field is intended for short strings (eg. less than 200 characters). For longer strings, the TX or FT data type should be used.
TS	Time Stamp	Contains the exact time of an event, including the date and time following the date/time rules.	YYYY[MM[DD[HHMM[SS[,S[S]]]]]] [+/-ZZZZ]^<Degree of precision>
VID	Version Identifier	Used to identify the HL7 version.	<Version ID>^<Internationalization code>^<international version ID>
XPN	Extended person name	Extended PN.	<Family name>&<Last Name Prefix>^<Given Name>^<Middle Initial>^<Suffix>^ <Prefix>^<Degree>^<Name type code>^ <Name representation code>

HL7 Data Type

Definition

Description

Composition

CK

Composite ID with Check Digit

This data type is used for certain fields that commonly contain check digits.

CM

Composite

A field that is a combination of other meaningful data fields.

CX

Extended Composite ID with Check Digit

Extended CK.

EI

Entity Identifier

It defines a given entity within a specified series of identifiers.

ID

Coded value for HL7 defined table

The value follows the formatting rules for an ST field except that it is drawn from a table of legal values.

NM

Numeric

A number represented as a series of ASCII numeric characters consisting of an optional leading sign (+ or -), the digits, and an optional decimal point.

PN

Person Name

This data type includes multiple free text components with each component specified as an HL7 ST data type.

ST

String Data

String data is left justified with trailing blanks optional; This covers any displayable ASCII characters. This field is intended for short strings (eg. less than 200 characters). For longer strings, the TX or FT data type should be used.

TS

Time Stamp

Contains the exact time of an event, including the date and time following the date/time rules.

YYYY[MM[DD[HHMM[SS[,S[S]]]]]] [+/-ZZZZ]^<Degree of precision>

VID

Version Identifier

Used to identify the HL7 version.

XPN

Extended person name

Extended PN.