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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
SDC-0002-021-JE-2023
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
SDC-0002-021-JE-2023
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
SDC-0002-021-JE-2023
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
SDC-0002-021-JE-2023
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
SDC-0002-021-JE-2023
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
SDC-0002-021-JE-2023
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
SDC-0002-021-JE-2023
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
SDC-0002-021-JE-2023
Lexical Principles
Establish: Preferred and non-preferred terms Synonyms Abbreviations Component length Spelling Permissible character set Case sensitivity
SDC-0002-021-JE-2023
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
SDC-0002-021-JE-2023
Naming Considerations
Each name must be identified with a context
Every data element must have at least one name
Multiple names may be appropriate
SDC-0002-021-JE-2023
Name Context
The source of the data element name:
Where it is used
Authority for use
Language
SDC-0002-021-JE-2023
Name Context Examples
Registry Name
Legacy Name
Short Name
Source Name
Standard Name
– Country Code
– CTRY_CODE
– CRYCD
– CTRY_CD
– ISO 3166 Country Code
SDC-0002-021-JE-2023
Data Element Application Contexts
Abstract (GILS) Abstract (ASN) InformationResource.Description.Text
(BSR) Description (Dublin Core) Abstract (FGDC) Résumé (French) Abstract (SGML Tag)
SDC-0002-021-JE-2023
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
SDC-0002-021-JE-2023
Representation Terms
Amount Code Count Date Group Measure
Name Number Quantity Rate Text Time
SDC-0002-021-JE-2023
Representation Term Examples
Name – Country Name
– County Numeric Code
– Latitude Degrees Measure
Code
Measure
SDC-0002-021-JE-2023
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
SDC-0002-021-JE-2023
Data Element Name Examples
Employee Last Name
Address State
Tower Height
– Best Employee Last Name
– Mailing Address State Code
– Transmission Tower Height Measure
SDC-0002-021-JE-2023
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
SDC-0002-021-JE-2023
Qualifier Term Examples
Best
Mailing
Transmission
– Best Employee Last Name
– Mailing Address State Code
– Transmission Tower Height Measure
SDC-0002-021-JE-2023
Semantics of Separators
Used to separate name components
No semantic meaning
Semantic meaning
Special meaning for a specific language
SDC-0002-021-JE-2023
Semantic Separator Examples
Best_Employee_Last_Name
Mailing.Address.State.Code
Transmission:Tower:Height_Measure
Mailing Address Country Name
SDC-0002-021-JE-2023
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