Model and Term definitions from ISO 19156 Final CD

This week I sent the 'Final Committee Draft' of ISO 19156 (Observations and
Measurements version 2) to the ISO/TC 211 secretariat. 

If all goes smoothly (and there is no reason to expect that it won't) this
will be accepted as the text of a 'Draft International Standard' published
by ISO from Geneva (i.e. a publicly available document, not just internal to
TC 211). 

 

The UML for the O&M v2 model is in the ISO harmonized model, which is
available in XMI (suitable for use in Sparx Enterprise Architect) from the
SVN mirror at CSIRO, as described in the HollowWorld wiki page
https://www.seegrid.csiro.au/twiki/bin/view/AppSchemas/ConfiguringUMLToolFor
HollowWorld 

 

As is standard for ISO documents, clause 4 contains 'Terms and definitions',
which consolidates terms borrowed from other ISO documents, as well as terms
defined in the present document. 

Here is the content of that clause:


1          Terms and definitions


For the purposes of this document, the following terms and definitions
apply.

4.1

application schema

conceptual schema for data required by one or more applications

[ISO 19101:2002, definition 4.2]

4.2

coverage

feature that acts as a function to return values from its range for any
direct position within its spatial, temporal or spatiotemporal domain

[ISO 19123:2005, definition 4.17]

4.3

data type

specification of a value domain with operations allowed on values in this
domain 

[ISO/TS 19103:2005, definition 4.1.5]

EXAMPLE            Integer, Real, Boolean, String, Date (conversion of a
date into a series of codes).

NOTE          Data types include primitive predefined types and
user-definable types. All instances of a data types lack identity.

4.4

domain feature

feature of a type defined within a particular application domain

NOTE          This may be contrasted with observations and sampling
features, which are features of types defined for cross-domain purposes. 

4.5

feature

abstraction of real-world phenomena 

[ISO 19101:2002, definition 4.11]

NOTE          A feature may occur as a type or an instance. Feature type or
feature instance should be used when only one is meant.

4.6

feature type

class of features having common characteristics 

4.7

measurand

particular quantity subject to measurement 

[ISO/TS 19138:2006, definition 4.5]

NOTE          Specialization of observable property-type. 

4.8

measure

value described using a numeric amount with a scale or using a scalar
reference system

[ISO 19136:2007, definition 4.1.41]

4.9

measurement

set of operations having the object of determining the value of a quantity 

[ISO/TS 19101-2:2008, definition 4.20]

4.10

observation

act of observing a property

NOTE          The goal of an observation may be to measure or otherwise
determine the value of a property

4.11

observation procedure 

method, algorithm or instrument, or system of these which may be used in
making an observation

4.12

observation protocol 

combination of a sampling strategy and an observation procedure used in
making an observation

4.13

observation result

estimate of the value of a property determined through a known procedure

4.14

property <General Feature Model>

facet or attribute of an object referenced by a name 

EXAMPLE            Abby's car has the colour red, where "colour red" is a
property of the car instance

4.15

property-type

characteristic of a feature type

EXAMPLE            cars (a feature-type) all have a characteristic colour,
where "colour" is a property-type 

NOTE 1       The value for an instance of a property-type may be estimated
through an act of observation 

NOTE 2       In chemistry-related applications, the term 'determinand' or
'analyte' is often used. 

[Adapted from ISO 19109:2005]

4.16

sampling feature

feature, such as a station, transect, section or specimen, which is involved
in making observations concerning a domain feature

NOTE          A sampling feature is purely an artefact of the observational
strategy, and has no significance independent of the observational campaign.


4.17

value

element of a type domain

[ISO/IEC 19501:2005]

NOTE 1       A value may consider a possible state of an object within a
class or type (domain).

NOTE 2       A data value is an instance of a data type, a value without
identity.

NOTE 3       A value may use one of a variety of scales including nominal,
ordinal, ratio and interval, spatial and temporal. Primitive datatypes may
be combined to form aggregate datatypes with aggregate values, including
vectors, tensors and images