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Tabular data in DDI 1.1

Tabular data in DDI 1.1. Emiel Kaper Wendy Thomas. DDI meeting 17/5/2001 Amsterdam IASSIST/IFDO Conference. Introduction. Efforts by: Titto Assini, Bill Block, Ann Green, Jean-Pierre Kent, Jostein Ryssevik, … Terminology (backgrounds) Criteria Logical vs. Physical What next.

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Tabular data in DDI 1.1

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  1. Tabular data in DDI 1.1 Emiel Kaper Wendy Thomas DDI meeting 17/5/2001 Amsterdam IASSIST/IFDO Conference

  2. Introduction • Efforts by: • Titto Assini, Bill Block, Ann Green, Jean-Pierre Kent, Jostein Ryssevik, … • Terminology (backgrounds) • Criteria • Logical vs. Physical • What next DDI meeting 17/5/2001 , Amsterdam, IASSIST/IFDO Conference

  3. Terminology • nCube • Aggregate/Multi dimensional Table, Matrix • Variable • Data Item • Dimension • Variable DDI meeting 17/5/2001 , Amsterdam, IASSIST/IFDO Conference

  4. Criteria for acceptance • Logical description: nCube • Dimensions, variables, items, cells • Physical storage of 2 dimensional table • Location of files, sheets, cells • Functionality • Hinging, searching, inheritance DDI meeting 17/5/2001 , Amsterdam, IASSIST/IFDO Conference

  5. Logical vs Physical • In DDI 1.0 mixed • dataDscr\var\location • In aggregate data often mixed • Layout of table (stubs, cells) mixed with storage and logic • Relation to DDI 1.0 • Compatability, limit redundancy • In DDI 1.1 disentangled DDI meeting 17/5/2001 , Amsterdam, IASSIST/IFDO Conference

  6. Add to Micro Logic • Logically, an nCube is a different logical representation of multidimensional tables. • Use current logic (variables etc.) • Add only specific Cube logic • Measure • Dimension • Cohort • Coordinate structure DDI meeting 17/5/2001 , Amsterdam, IASSIST/IFDO Conference

  7. Enhance Physical structure • Storage moved (copied) to fileDscr • Location / locMap • n Data per File, n File per Data • Add physical structure for 2 dim table: • Grid • Layer Sheet • Cells • Co-ordinates DDI meeting 17/5/2001 , Amsterdam, IASSIST/IFDO Conference

  8. codeBook fileDscr dataDscr var catgry nCube dmns timeDmns cohort measure DDI Cubes Proposal DDI meeting 17/5/2001 , Amsterdam, IASSIST/IFDO Conference

  9. What next? • Hope for support by this DDI-group • Dots on the i’s • Tag library & examples • Washington D.C., June 29th DDI meeting 17/5/2001 , Amsterdam, IASSIST/IFDO Conference

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