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Advances in Data Documentation Initiative (DDI) at IASSIST/IFDO Conference 2001

This document outlines the key discussions and proposals from the DDI meeting held on May 17, 2001, in Amsterdam during the IASSIST/IFDO Conference. Key topics included terminology related to data management, criteria for acceptance of data structures like nCube and multi-dimensional tables, and the distinction between logical and physical representations in data documentation. The meeting emphasized the need for coherence in DDI 1.1, aiming to enhance both logical frameworks and physical structures, paving the way for further development in DDI standards.

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Advances in Data Documentation Initiative (DDI) at IASSIST/IFDO Conference 2001

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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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