Tommie Curtis SAIC January 17, 2000 Open Forum on Metadata Registries Santa Fe, NM SDC-0002-021-JE-2023.

Tommie Curtis SAICJanuary 17, 2000

Open Forum onMetadata Registries

Santa Fe, NM

SDC-0002-021-JE-2023

SDC-0002-021-JE-2023

Identifying Attributesfor a Data Element

Registration Authority Identifier

Data Identifier

Version Identifier

Name

Context

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Component Identifier

Registration Authority Identifier - the identifier of any organization authorized to register a data element

Data Identifier - the unique identifier of a data element assigned by a Registration Authority

Version Identifier - the identification of an issue of a data element

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Component Identifier Example

1. Registration Authority Identifier: 0060169254567

2. Data Element Identifier: 12567

3. Version Identifier: 01

1 + 2 + 3 = 00601692545671256701

http://www.sdct.itl.nist.gov/~ftp/x3l8/other/Standards/ISO06523/Listb-for-htm.htm

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Rules for Registration Identification of Data

1. Each data element shall have a uniquedata identifier within a registry

2. The component identifier shall provide unique identification of data element information for transfer outside a registry

3. A data element shall have at least onename within a context

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Rules for Registration Identification of Data (cont.)

4. To be assigned a component identifier in accordance with ISO/IEC 11179, a data element shall be:

Derived according to Part 2 Attributed according to Part 3 Defined according to Part 4 Named according to Part 5 Registered according to Part 6

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Identifying Attributesfor a Data Element

Name - the word or combination of words by which a data element is known

Context - the source of a data element name

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Development of aNaming Convention

Establish a scope for the convention

Determine the authority that establishes a name

Develop semantic rules for the source and content of words used in a name

Formulate syntax rules for required word order

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Development of aNaming Convention (cont.)

Develop lexical rules covering controlled word lists, name length, character set, and language

Set guidelines on uniqueness of names in context

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Lexical Principles

Establish: Preferred and non-preferred terms Synonyms Abbreviations Component length Spelling Permissible character set Case sensitivity

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Using a Thesaurus

Source of name components

Provides semantic linking of preferred terms

Gives guidance in using homographs

Shows equivalence, hierarchy, and association

Allows a controlled vocabulary

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Naming Considerations

Each name must be identified with a context

Every data element must have at least one name

Multiple names may be appropriate

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Name Context

The source of the data element name:

Where it is used

Authority for use

Language

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Name Context Examples

Registry Name

Legacy Name

Short Name

Source Name

Standard Name

– Country Code

– CTRY_CODE

– CRYCD

– CTRY_CD

– ISO 3166 Country Code

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Data Element Application Contexts

Abstract (GILS) Abstract (ASN) InformationResource.Description.Text

(BSR) Description (Dublin Core) Abstract (FGDC) Résumé (French) Abstract (SGML Tag)

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Representation Term

Describes the form of the set of valid values for a data element

Describes the form of the representation of a data element

If the representation is redundant with the property term, one term or part of a term may be removed

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Representation Terms

Amount Code Count Date Group Measure

Name Number Quantity Rate Text Time

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Representation Term Examples

Name – Country Name

– County Numeric Code

– Latitude Degrees Measure

Code

Measure

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Data Element Name Content

May be derived from the conceptual domain

May be derived from a logical group or entity class

May come from terms that express the category to which the data element belongs

May be an organizational name

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Data Element Name Examples

Employee Last Name

Address State

Tower Height

– Best Employee Last Name

– Mailing Address State Code

– Transmission Tower Height Measure

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Qualifier Term

A word or words which help define and differentiate a name within the database

May be attached to any basic data element name and representation class term

May be derived from structured sets of terms

Should not be redundant

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Qualifier Term Examples

Best

Mailing

Transmission

– Best Employee Last Name

– Mailing Address State Code

– Transmission Tower Height Measure

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Semantics of Separators

Used to separate name components

No semantic meaning

Semantic meaning

Special meaning for a specific language

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Semantic Separator Examples

Best_Employee_Last_Name

Mailing.Address.State.Code

Transmission:Tower:Height_Measure

Mailing Address Country Name

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So, What’s in a Name?

Establishes what people call a data element. People can use different names in different contexts

Expresses the primary means to refer to objects and concepts for humans