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Evolution of Metadata Standards: New Features in ISO 19115. Ted Habermann NOAA National Data Centers December, 2007 [email protected] Evolution of Documentation Standards. ISO 19115 – 2. ISO 19115/NAP. FGDC Remote Sensing Extensions. Directory Interchange Format. NASA

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evolution of metadata standards new features in iso 19115

Evolution of Metadata Standards: New Features in ISO 19115

Ted Habermann

NOAA National Data Centers

December, 2007

[email protected]

evolution of documentation standards
Evolution of Documentation Standards

ISO 19115 – 2

ISO 19115/NAP

FGDC Remote

Sensing Extensions

Directory

Interchange

Format

NASA

EOS Core

System

Metadata

FGDC

NOAA

Supplemental

question 1
Question #1

New Standard Emerges:

What is the minimum that I need to do to conform to this standard?

The answer is a short list of metadata elements.

What is the most that this standard can do for me?

Depends on 1) understanding of the standard and 2) ingenuity..

The goal of this presentation is to increase understanding of the standard. The ingenuity is up to you.

metadata needs
Metadata Needs

The rest of this presentation is made up of a series of questions about your metadata needs. Suggested answers using ISO 19115 and 19115-2 are provided.

These suggested approaches are presently being tested at NGDC and some may survive to become recommended best practices. Others may evolve significantly as our understanding and experience increases.

do you need to unambiguously identify things using your own namespace
Do you need to unambiguously identify things using your own namespace?

MD_Identifier

+ authority [0..1] : CI_Citation

+ code : CharacterString

Where are identifiers?

aggregationInfo/aggregateDataSetIdentifier

dataQualityInfo/report/measureIdentification

extent/geographicElement/geographicIdentifier

processStep/processingInformation/identifier

acquisitionInformation/operation/identifier

platform/identifier

platform/instrument/identifier

Where are Citations?

identificationInfo/citation

applicationSchemaInfo.name

dataQualityInfo/report/specification

contentinfo/featureCatalogueCitation

identificationInfo/aggregationInfo/aggregateDataSetName

identificationInfo/descriptiveKeywords/thesaurusName

dataQualityInfo/report/evaluationProcedure

dataQualityInfo/lineage/source/sourceCitation

dataQualityInfo/lineage/processStep/processingInformation/documentation

dataQualityInfo/lineage/processStep/processingInformation/algorithm/citation

acquisitionInformation/operation/citation

acquisitionInformation/platform/citation

acquisitionInformation/platform/instrument/citation

do you want to manage metadata using a relational or xml database
Do you want to manage metadata using a relational or XML database?

Unique IDs are critical for identifying items and creating relationships in relational databases.

do you want to serve metadata using a rest web service
Do you want to serve metadata using a REST web service?

Key Principle for REST Services: Give every “thing” an ID

ISO 19115 and 19115-2 include identifiers for between 30 and 40 different items (see background slides for details)

Number of ID\'s Included in Standard

do you need to identify people in different roles
Do you need to identify people in different roles?

CI_ResponsibleParty

+ individualName [0..1] : CharacterString

+ organisationName [0..1] : CharacterString

+ positionName [0..1] : CharacterString

+ contactInfo [0..1] : CI_Contact

+ role : CI_RoleCode

CI_RoleCode

+ resourceProvider

+ custodian

+ owner

+ user

+ distributor

+ originator

+ pointOfContact

+ principalInvestigator

+ processor

+ publisher

+ author

Where Are Contacts?

MD_Metadata.contact

MD_Identification.pointOfContact

MD_Usage.userContactInfo

LI_ProcessStep.processor

MD_MaintenanceInformation.contact

MD_Distributor.distributorContact

MD_ExtendedElementInformation.source

do you need different documentation for different parts of your data
Do you need different documentation for different parts of your data?

MD_Metadata

+ fileIdentifier [0..1] : CharacterString

+ language [0..1] : CharacterString

+ characterSet [0..1] : MD_CharacterSetCode = "utf8"

+ parentIdentifier [0..1] : CharacterString

+ hierarchyLevel [0..*] : MD_ScopeCode = "dataset"

+ hierarchyLevelName [0..*] : CharacterString

+ contact [1..*] : CI_ResponsibleParty

+ dateStamp : Date

+ metadataStandardName [0..1] : CharacterString

+ metadataStandardVersion [0..1] : CharacterString

+ dataSetURI [0..1] : CharacterString

MD_ScopeCode

+ attribute

+ attributeType

+ collectionHardware

+ collectionSession

+ dataset

+ series

+ nonGeographicDataset

+ dimensionGroup

+ feature

+ featureType

+ propertyType

+ fieldSession

+ software

+ service

+ model

+ tile

ScopeCodes can apply to:

1) MD_Metadata

2) DQ_DataQuality

3) MD_MaintenanceInformation

do you need different documentation for different temporal and spatial subsets

EX_VerticalExtent

+minimumValue: Real

+maximumValue: Real

+unitOfMeasure: UomLength

<<DataType>>

EX_Extent

+description [0..1]: Character String

<<Abstract>>

EX_GeographicExtent

+extentTypeCode [0..1]: Boolean="1"

EX_TemporalExtent

+extent: TM_Primitive

EX_BoundingPolygon

EX_GeographicDescription

+polygon [0..1]: GM_Object

+geographicIdentifier: MD_Identifier

EX_GeographicBoundingBox

+westBoundingLongitude: Decimal

+eastBoundingLongitude: Decimal

+southBoundingLatiitude: Decimal

+northBoundingLatiitude: Decimal

Do you need different documentation for different temporal and spatial subsets?
do you need to reference on line resources
Do you need to reference On-Line Resources?

CI_OnlineResource

+ linkage : URL

+ protocol [0..1] : CharacterString

+ applicationProfile [0..1] : CharacterString

+ name [0..1] : CharacterString

+ description [0..1] : CharacterString

+ function [0..1] : CI_OnLineFunctionCode

CI_OnLineFunctionCode

+ download

+ information

+ offlineAccess

+ order

+ search

do you need to describe many kinds of aggregations
Do you need to describe many kinds of aggregations?

MD_AggregateInformation

+ aggregateDataSetName [0..1] : CI_Citation

+ aggregateDataSetIdentifier [0..1] : MD_Identifier

+ associationType : DS_AssociationTypeCode

+ initiativeType [0..1] : DS_InitiativeTypeCode

MD_InitiativeTypeCode

+ campaign

+ collection

+ exercise

+ experiment

+ investigation

+ mission

+ sensor

+ operation

+ platform

+ process

+ program

+ project

+ study

+ task

+ trial

DS_AssociationTypeCode

+ crossReference

+ largerWorkCitation

+ partOfSeamlessDatabase

+ source

+ stereoMate

does data quality vary within the dataset
Does data quality vary within the dataset?

DQ_Scope

+ level: MD_ScopeCode

+ extent [0..1] : EX_Extent

+ levelDescription [0..*] : MD_ScopeDescription

EX_Extent

describes the spatial and temporal extent of the quality section.

MD_ScopeDescription

+ attributes : Set<GF_AttributeType>

+ features : Set<GF_FeatureType>

+ featureInstances : Set<GF_FeatureType>

+ attributeInstances : Set<GF_AttributeType>

+ dataset : CharacterString

+ other : CharacterString

MD_ScopeCode

+ attribute

+ attributeType

+ collectionHardware

+ collectionSession

+ dataset

+ series

+ nonGeographicDataset

+ dimensionGroup

+ feature

+ featureType

+ propertyType

+ fieldSession

+ software

+ service

+ model

+ tile

do you need to track compliance with standards
Do you need to track compliance with standards?

DQ_ConformanceResult

+ specification : CI_Citation

+ explanation : CharacterString

+ pass : Boolean

do you need to use spatial features to describe quality
Do you need to use spatial features to describe quality?

QE_CoverageResult

+ spatialRepresentationType: vector, grid, textTable, tin, stereoModel, video

+ resultFile [1]: MX_DataFile

+ resultFormat [1]: MD_format

do you need to keep track of user problems
Do you need to keep track of user problems?

MD_Usage

+ specificUsage : CharacterString

+ usageDateTime [0..1] : DateTime

+ userDeterminedLimitations [0..1] : CharacterString

+ userContactInfo [1..*] : CI_ResponsibleParty

do you need to describe sources with different spatial and temporal extents
Do you need to describe sources with different spatial and temporal extents?

LI_Source

+ description [0..1] : CharacterString

+ scaleDenominator [0..1] : MD_RepresentativeFraction

+ sourceReferenceSystem [0..1] : MD_ReferenceSystem

+ sourceCitation [0..1] : CI_Citation

+ sourceExtent [0..*] : EX_Extent

do you need to describe requirements and objectives
Do you need to describe requirements and objectives?

MI_Requirement

+ citation[0..1] : CI_Citation

+ identifier : MD_Identifier

+ requestor[1..*] : CI_ResponsibleParty

+ recipient[1..*] : CI_ResponsibleParty

+ priority : MI_PriorityCode

+ requestedDate : MI_RequestedDate

+ expiryDate : DateTimeMI

MI_Objective

+ identifier[1..*] : MD_Identifier

+ priority[0..1] : CharacterString

+ type[0..*] : MI_ObjectiveTypeCode

+ function[0..*] : CharacterString

+ extent[0..*] : EX_Extent

19115-2

do you need to describe platforms and instruments
Do you need to describe platforms and instruments?

MI_Platform

+ citation[0..*] : CI_Citation

+ identifier : MD_Identifier

+ description : CharacterString

+ sponsor[0..*] : CI_ResponsibleParty

MI_Instrument

+ citation[0..*] : CI_Citation

+ identifier : MD_Identifier

+ description : CharacterString

+ description[0..1] : CharacterString

19115-2

do you need to explain why you did things to the data
Do you need to explain why you did things to the data?

LI_ProcessStep

+ description : CharacterString

+ rationale [0..1] : CharacterString

+ dateTime [0..1] : DateTime

+ processor [0..*] : CI_ResponsibleParty

+ source [0..*]: LI_Source

do need to share data with international partners
Do need to share data with international partners?

International

Standards

Organization

metadata standard selection guide
Metadata Standard Selection Guide

Do you need to unambiguously identify things using your own namespace?

Do you want to manage metadata using a relational or XML database?

Do you want to serve metadata using a REST web service?

Do you need to identify people in different roles?

Do you need different documentation for different parts of your data?

Do you need different documentation for different temporal and spatial subsets?

Do you need to reference On-Line Resources?

Do you need to describe many kinds of aggregations?

Does data quality vary within the dataset?

Do you need to track compliance with standards?

Do you need to use spatial features to describe quality, like grids of quality flags?

Do you need to keep track of user problems?

Do you need to explain why you did things to the data?

Do need to share data with international partners?

Yes

the time is now
The time is now.

ISO 19115 is up for a five year review in 2008. This is the time for evolution.

You are the force that influences evolution.

Get Ingenious!

[email protected]

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