TestDataResults

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** No error handling on the formats_risks page if nothing has been classified!
** No error handling on the formats_risks page if nothing has been classified!
** The files missing bug was a problem with the script generating the EP3XML not escaping URLs correctly. With this fixed all repositories populate correctly. NEED TO SUBMIT THIS TO GOOGLE CODE OR SOMETHING?
** The files missing bug was a problem with the script generating the EP3XML not escaping URLs correctly. With this fixed all repositories populate correctly. NEED TO SUBMIT THIS TO GOOGLE CODE OR SOMETHING?
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= The Differences =
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* ROAR: DROID v1.2 with signature file version 12.
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* Preserv2-EPrints-Toolkit: DROID v3.0 with signature file version 13.
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= General Observations =
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* The Preserv2-EPrints-Toolkit version of DROID has issues when trying to differentiate between different types of text and rtf files.
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* As a result it classifies them all as one type.
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* Pronom is lacking a complete set of mime-types for its format data, which is key when it comes to changing identifiers.
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* The Preserv2-EPrints-Toolkit version of DROID is able to classify more objects, cutting down on the number of unknowns
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* Some files have been updated in the base repositories but remain of the same mime-type. DROID classification error or manual user update, unfortunately there is no way to tell.
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= Typical Repository Outcomes =
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* 2 files, previously of known format are now unknown?
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*

Revision as of 13:41, 25 February 2009

For now this is a bullet pointed list which needs bulking out:

  • When harvesting repositories about 1/3 of downloads fail for various reasons, Further Investigation?
  • ROAR identifies a lot of stuff at HTML as it may get redirected to html in the process of trying to get a resource. This is wrong as this is not then the resource, the bug we believe is in the fact that the repository sends a HTTP 200 and not an HTTP 401 header. This is particularly the case on the ANU repository where we have only 74 items as fmt/94 (html) is the redirected 401 page. Further Investigation?
  • FIRST PARSE RESULTS (with the above correction)
    • All 994 files were located by the EPrints3.2 classification engine.
    • Only 45 objects were left unclassified which is better than the 129 which were UNKNOWN at the time of importation.
    • All other comparisons are difficult at this stage.
    • Some initial observations:
      • DROID is classifying the objects differently from the original classification however these are still the same in mime type. For example an HTML 4.0 file is now being classified as an XHTML or just HTML file. The same is true of text files and some PDFs. We suspect this is due to the Tentative classifications which DROID provides for some files. As a result we are now including the classification quality (tentative, positive) in the data output from a classification.
    • update_pronom_uids scripts tries to process NULL and thus dies because it receives an error 400, technically it should only die if the service is not reachable, or just do it on a per object basis.
    • In the philsci repository the number of files with pronomids is correct but the division by mime-type is wrong.
    • No error handling on the formats_risks page if nothing has been classified!
    • The files missing bug was a problem with the script generating the EP3XML not escaping URLs correctly. With this fixed all repositories populate correctly. NEED TO SUBMIT THIS TO GOOGLE CODE OR SOMETHING?

The Differences

  • ROAR: DROID v1.2 with signature file version 12.
  • Preserv2-EPrints-Toolkit: DROID v3.0 with signature file version 13.

General Observations

  • The Preserv2-EPrints-Toolkit version of DROID has issues when trying to differentiate between different types of text and rtf files.
  • As a result it classifies them all as one type.
  • Pronom is lacking a complete set of mime-types for its format data, which is key when it comes to changing identifiers.
  • The Preserv2-EPrints-Toolkit version of DROID is able to classify more objects, cutting down on the number of unknowns
  • Some files have been updated in the base repositories but remain of the same mime-type. DROID classification error or manual user update, unfortunately there is no way to tell.

Typical Repository Outcomes

  • 2 files, previously of known format are now unknown?
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