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General requirements for the soundness of metadata models

Tjalling Gelsema Statistics Netherlands. General requirements for the soundness of metadata models. Contents. General requirements Completeness No junk No confusion The logic of classification structures Leisure activities Concluding remarks. General idea.

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General requirements for the soundness of metadata models

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  1. Tjalling Gelsema Statistics Netherlands General requirements for the soundness of metadata models

  2. Contents • General requirements Completeness No junk No confusion • The logic of classification structures Leisure activities • Concluding remarks

  3. General idea

  4. Classification structures

  5. I. Incompleteness

  6. II. Junk

  7. III. Confusion

  8. Classification structures: junk

  9. Why junk is bad

  10. Why confusion is bad

  11. The logic ofclassification structures • identify synonymous categories • maintain backward compatibility

  12. Adding two categories • Reading & Biking : Economical • Biking & Shopping : Relaxing

  13. But what about these: • Group : synonymous with Outdoor (no confusion) • Piano playing : not backward compatible

  14. Conclusion • Avoid junk (if possible) • Avoid confusion (if possible) • Classification structures are Boolean algebras

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