Learn How to Create DDI Metadata A Technical

Learn How to Create DDI Metadata A Technical Introduction

Welcome to EDDI

Agenda DDI Introduction XML Introduction DDI Walkthrough and Exercises Publishing DDI Where to Learn More Discussion

Learn DDI 3 in 60 Seconds

using Survey Instruments Study made up of measures about Concepts Questions Universes Copyright © GESIS – Leibniz Institute for the Social Sciences, 2010 Published under Creative Commons Attribute-Share. Alike 3. 0 Unported

with values of Categories/ Codes, Numbers Questions Variables collect made up of Responses Data Files resulting in Copyright © GESIS – Leibniz Institute for the Social Sciences, 2010 Published under Creative Commons Attribute-Share. Alike 3. 0 Unported

That’s Pretty Much It.

Studies Concepts Variables Concepts Codes Physical Location Categories Summary Statistics

Less Redundant Work 9

The Data Lifecycle 10 Documentation Lost

Better, Easier Documentation 11 Documentation is often a lower priority than data processing and analysis Make documentation a byproduct of the design and collection process The information is most accurate at this point

e. Xtensible Markup Language (XML) XML represents information XML is machine readable

XML Elements <Book> <Title> The Hitchhiker's Guide to the Galaxy </Title> <Author>Douglas Adams </Author> <Year> 1979 </Year> </Book>

XML Attributes <Book language=“English”> <Title> The Hitchhiker's Guide to the Galaxy </Title> <Author>Douglas Adams </Author> <Year> 1979 </Year> </Book>

Conflicting Tag Names <My. Data> <Table> <Legs>4</Legs> <Length units="feet">5</Length> <Width units="feet">3</Width> </Table> <Rows>4</Rows> <Columns>3</Columns> </Table> </My. Data>

<My. Data xmlns: kitchen=“http: //www. example. org/kitchen” xmlns: data=“http: //www. example. org/data”> <kitchen: Table> <Legs>4</Legs> <Length units="feet">5</Length> <Width units="feet">3</Width> </kitchen: Table> <data: Table> <Rows>4</Rows> <Columns>3</Columns> </data: Table> </My. Data>

DDI and XML <DDIInstance> <Study. Unit>. . . </Study. Unit> <Resource. Package> <Question. Scheme /> <Variable. Scheme /> <Concept. Scheme /> <Physical. Instance /> </Resource. Package> </DDIInstance>

DDI and XML <DDIInstance> <Study. Unit>. . . </Study. Unit> <Resource. Package> <Question. Scheme /> <Variable. Scheme /> <Concept. Scheme /> <Physical. Instance /> </Resource. Package> </DDIInstance>

DDI Walkthrough

Universes People attending EDDI

A Universe in XML <c: Universe id=“universe 1"> <r: Label xml: lang="en">EDDI Participants</r: Label> <c: Human. Readable xml: lang="en"> People attending the EDDI 2011 conference in Gothenburg. </c: Human. Readable> </c: Universe>

A Universe in XML <c: Universe id=“universe 1"> <r: Label xml: lang="en">EDDI Participants</r: Label> <c: Human. Readable xml: lang="en"> People attending the EDDI 2011 conference in Gothenburg. </c: Human. Readable> </c: Universe>

Using the DDI Workshop Helper

DDI Workshop Helper http: //ddiworkshop. thatip. net/ Login: your email address Password: eddi 2011

Concepts A concept defines something that may be measured � Age � Gender � Employment status

A Concept in DDI <c: Concept id="concept 1" version="1. 0. 0"> <c: Concept. Name xml: lang="en">Hitchhiking</c: Concept. Name> <r: Description xml: lang="en"> Hitchhiking is a means of transportation that is gained by asking people, usually strangers, for a ride in their automobile or other road vehicle </r: Description> </c: Concept>

Where did it go? <ddi: DDIInstance> <g: Resource. Package> <c: Concept. Scheme> <c: Concept id="concept 1">. . . </c: Concept> </c: Concept. Scheme> </g: Resource. Package> </ddi: DDIInstance>

Where did it go? <ddi: DDIInstance> <g: Resource. Package> <c: Concept. Scheme> <c: Concept id="concept 1">. . . </c: Concept> </c: Concept. Scheme> </g: Resource. Package> </ddi: DDIInstance>

Identification <c: Concept. Scheme id="scheme 1" version="1. 0. 0" agency="example. org"> <c: Concept id="c 1">. . . </c: Concept> <c: Concept id="c 2">. . . </c: Concept> <c: Concept id="c 3">. . . </c: Concept> </c: Concept. Scheme>

Categories Mode of Transportation � Airplane � Automobile � Boat

<l: Category. Scheme id="categories 1" version="1. 0. 0" agency="example. org"> <l: Category. Scheme. Name xml: lang="en"> Mode of Transportation </l: Category. Scheme. Name> <l: Category id="cat 1"> <r: Label xml: lang="en">Airplane</r: Label> </l: Category> <l: Category id="cat 2"> <r: Label xml: lang="en">Automobile</r: Label> </l: Category> <l: Category id="cat 3"> <r: Label xml: lang="en">Boat</r: Label> </l: Category. Scheme>

<l: Category. Scheme id="categories 1" version="1. 0. 0" agency="example. org"> <l: Category. Scheme. Name xml: lang="en"> Mode of Transportation </l: Category. Scheme. Name> <l: Category id="cat 1"> <r: Label xml: lang="en">Airplane</r: Label> </l: Category> <l: Category id="cat 2"> <r: Label xml: lang="en">Automobile</r: Label> </l: Category> <l: Category id="cat 3"> <r: Label xml: lang="en">Boat</r: Label> </l: Category. Scheme>

Codes Mode of Transportation Value 1 2 3 Category Airplane Automobile Boat

Codes Marital Status Value 0 1 2 Category Airplane Automobile Boat

References in DDI Category List Code List 1 Code List 2 Code List 3

<l: Code> <l: Category. Reference> <r: Scheme> <r: ID>categories 1</r: ID> <r: Identifying. Agency>example. org</r: Identifying. Agency> <r: Version>1. 0. 0</r: Version> </r: Scheme> <r: ID>cat 1</r: ID> <r: Identifying. Agency>example. org</r: Identifying. Agency> <r: Version>1. 0. 0</r: Version> </l: Category. Reference> <l: Value>1</l: Value> </l: Code>

<l: Code> <l: Category. Reference> <r: Scheme> <r: ID>categories 1</r: ID> <r: Identifying. Agency>example. org</r: Identifying. Agency> <r: Version>1. 0. 0</r: Version> </r: Scheme> <r: ID>cat 1</r: ID> <r: Identifying. Agency>example. org</r: Identifying. Agency> <r: Version>1. 0. 0</r: Version> </l: Category. Reference> <l: Value>1</l: Value> </l: Code>

<l: Code. Scheme id="code. List 1" version="1. 0. 0" agency="example. org"> <l: Code. Scheme. Name xml: lang="en-US"> Transportation Codes </l: Code. Scheme. Name> <l: Code>. . . </l: Code> </l: Code. Scheme>

<l: Code. Scheme id="code. List 1" version="1. 0. 0" agency="example. org"> <l: Code. Scheme. Name xml: lang="en-US"> Transportation Codes </l: Code. Scheme. Name> <l: Code>. . . </l: Code> </l: Code. Scheme>

Questions What is your name? How did you get to Gothenburg?

A Question in DDI <d: Questiontem id="q 1" version="1. 0. 0"> <d: Question. Item. Name xml: lang="en">name</d: Question. Item. Name> <d: Question. Text xml: lang="en"> <d: Literal. Text> <d: Text>What is your name? </d: Text> </d: Literal. Text> </d: Question. Text> <d: Text. Domain min. Length="1"></d: Text. Domain> </d: Question. Item>

A Question in DDI <d: Questiontem id="q 1" version="1. 0. 0"> <d: Question. Item. Name xml: lang="en">name</d: Question. Item. Name> <d: Question. Text xml: lang="en"> <d: Literal. Text> <d: Text>What is your name? </d: Text> </d: Literal. Text> </d: Question. Text> <d: Text. Domain min. Length="1"></d: Text. Domain> </d: Question. Item>

Other Response Types Text Numeric Date. Time Category Code Geographic

Question with a Code List <d: Questiontem id="q 1" version="1. 0. 0"> <d: Question. Item. Name xml: lang="en">transport</d: Question. Item. Name> <d: Question. Text xml: lang="en"> <d: Literal. Text> <d: Text>How did you get to Gothenburg? </d: Text> </d: Literal. Text> </d: Question. Text> <d: Code. Domain> <r: Code. Scheme. Reference> <r: ID>code. List 1</r: ID> <r: Identifying. Agency>example. org</r: Identifying. Agency> <r: Version>1. 0. 0</r: Version> </r: Code. Scheme. Reference> </d: Code. Domain> </d: Question. Item>

Variables Name Mode of Transportation

A Variable in DDI <l: Variable id="var 1" version="1. 0. 0"> <l: Variable. Name xml: lang="en">name</l: Variable. Name> <r: Label xml: lang="en">The person's name</r: Label> <l: Representation> <l: Text. Representation /> </l: Representation> </l: Variable>

A Variable in DDI <l: Variable id="var 1" version="1. 0. 0"> <l: Variable. Name xml: lang="en">name</l: Variable. Name> <r: Label xml: lang="en">The person's name</r: Label> <l: Representation> <l: Text. Representation /> </l: Representation> </l: Variable>

And Then What?

Studies Study-level Information � Citation � Abstract, Purpose � Links to related materials Study Content � Survey Instruments � Datasets

Publishing DDI

Where to Learn More The DDI Web Site DDI Documentation Talk to Me

Thank you Instruct or Email Jeremy Iverson jeremy@colectica. com Web colectica. com Blog blogs. colectica. com Twitter @Colectica