# Difference between revisions of "DataTypes Comments Section 5"

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== [http://wiktolog.com/hl7/datatypes.html#datyp2qtytyp 5 Quantities] == | == [http://wiktolog.com/hl7/datatypes.html#datyp2qtytyp 5 Quantities] == | ||

* [http://wiktolog.com/hl7/datatypes.html#dt-QTY 5.1 Abstract Type Quantity (QTY) specializes ANY] | * [http://wiktolog.com/hl7/datatypes.html#dt-QTY 5.1 Abstract Type Quantity (QTY) specializes ANY] | ||

+ | *# 5.1.2 - To the best of my knowledge, a partial ordering relation is '' '''antisymmetric''' '', not '' '''asymmetric''' ''. While this is undoubtedly a trivial point, ''asymmetry'' is often defined as ''antisymmetric'' and ''irreflexive'', and <nowiki><=</nowiki> is clearly reflexive. This understanding is supported in this document by 5.1.3, where the less than relation is defined as ''asymmetric'' and ''transitive''. As we know that it is ''irreflexive'', it is unstated because it is part of the ''asymmetric'' definition. | ||

+ | *# 5.1.5 - same as 5.1.2. ''anti''symmetric | ||

* [http://wiktolog.com/hl7/datatypes.html#dt-QTZ 5.2 Abstract Type Zeroed Quantity (QTZ) specializes QTY] | * [http://wiktolog.com/hl7/datatypes.html#dt-QTZ 5.2 Abstract Type Zeroed Quantity (QTZ) specializes QTY] | ||

* [http://wiktolog.com/hl7/datatypes.html#dt-INT 5.3 Integer Number (INT) specializes QTZ] | * [http://wiktolog.com/hl7/datatypes.html#dt-INT 5.3 Integer Number (INT) specializes QTZ] |

## Revision as of 21:44, 9 March 2008

## 5 Quantities

- 5.1 Abstract Type Quantity (QTY) specializes ANY
- 5.1.2 - To the best of my knowledge, a partial ordering relation is
**antisymmetric****asymmetric***asymmetry*is often defined as*antisymmetric*and*irreflexive*, and <= is clearly reflexive. This understanding is supported in this document by 5.1.3, where the less than relation is defined as*asymmetric*and*transitive*. As we know that it is*irreflexive*, it is unstated because it is part of the*asymmetric*definition. - 5.1.5 - same as 5.1.2.
*anti*symmetric

- 5.1.2 - To the best of my knowledge, a partial ordering relation is
- 5.2 Abstract Type Zeroed Quantity (QTZ) specializes QTY
- 5.3 Integer Number (INT) specializes QTZ
- 5.4 Real Number (REAL) specializes QTZ
- 5.5 Ratio (RTO) specializes QTY
- 5.6 Physical Quantity (PQ) specializes QTZ
- 5.7 Physical Quantity Representation (PQR) specializes CV
- 5.8 Monetary Amount (MO) specializes QTZ
- 5.9 Calendar (CAL) specializes DSET<CLCY>
- 5.10 Calendar Cycle (CLCY) specializes ANY
- 5.11 Point in Time (TS) specializes QTY
- 5.12 Expression (EXPR) specializes T