Introduction to value documentation of EuroFIR datasets

1
Introduction to value documentation of EuroFIR
datasets

• W Becker
• Swedish National Food Administration
• IDUFIC, AFSSA, DFI

EuroFIR WP1.8 meeting, Paris 5-6 March, 2007
2
Background

• Documentation based on
• Draft EuroFIR Standards
• Priority components
• UAG comments
• Focus on aggregated/compiled datasets
• Level 3

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Data levels
4
UAG comments
Basic Component and unit some information on
source and age of data
5
UAG comments
6
UAG comments on Value info
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UAG other useful information
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Entity categories

• Food
• Component
• Value
• Method
• Reference

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Proposed EuroFIR thesauri

• Components
• Names groups
• Units
• Matrix units (modes of expression)
• Value Types

• Method Types
• Method Indicator
• component-method links table
• Reference Types
• Acquisition Types

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Adjunct thesauri

• Food LanguaL thesaurus
• Components ChEBI, CAS, INFOODS Tagnames
• Links included in Component thesaurus
• Other ISO standards for languages, countries,
  units

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Food description

• Original Food code
• Name in original language
• Name in English
• Langual facets
• Other, e.g. edible portion, portion sizes, recipe
  information, sampling details

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Component description

• EUROFOODS Component ID
• Defined in Thesaurus
• Name
• In original language
• In English (included in thesaurus)

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Component thesaurus
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Value description

• Selected value
• According the decision of the compiler
• Additional Statistical values may be given,
  e.g. range
• Unit (Thesaurus)
• Matrix unit (Mode of expression)(Thesaurus)
• Value Type (Thesaurus)
• E.g. mean, less than, below LOD, etc.
• Date of evaluation date of compilation
• Reference link to the bibliographical source
  reference
• Quality Index procedures and format to be
  decided

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Value Type

• Describes the figure in Selected value,
• Mean, median, best estimate, less than
• or gives a qualitative description of the value
  when no selected value can be given
• Below LOD, trace

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Unit thesaurus
common SI units
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Matrix unit thesaurus
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Method information

• Method Type (Thesuarus)
• e.g. analysed, calculated
• MI code (Thesaurus)
• Method Headline, currently 2 levels
• Method Parameter
• Further method information, e.g. temp, time,
  enzyme
• Reference
• Additional descriptors

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References

• Reference Code
• Reference Type (Thesaurus)
• e.g. analytical report, journal article, food
  composition DB
• Reference Data
• Bibliographic data for the reference record
  according to Reference Type
• Acquisition Type (Thesaurus) linked to each value
  reference

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Acquisition Type thesaurus

• Gives categories for the origin of a value, e.g.
• an evaluated FCDB or table
• a scientific publication,
• analytical report
• results calculated by the compiler
• Acquisition Types usually relate to the Reference
  associated with the value

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Sampling Analytical information

• Documentation needed for evaluating use and
  quality of data
• Generally applies to data at levels 1 2
• Includes
• Sampling plan and procedures
• Sample preparation and analytical procedures in
  lab

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Sampling information

• Sampling strategy
• design, no. of samples, composite sample, etc.
• Reason for analysis
• Place of sampling
• Date of sampling
• Transport handling

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Analytical Information

• Sample preparation
• Analytical details
• Description of QA procedures, e.g. confirmation
  procedure, quality control, use of reference
  material and methods, etc.
• Performance
• Accuracy, LOD, LOQ
• Date of analysis