So Sorting ing do documents uments by b y base se the heme me - - PowerPoint PPT Presentation

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So Sorting ing do documents uments by b y base se the heme me - - PowerPoint PPT Presentation

Jul 07, 2023 604 likes •819 views

UDC Seminar 2013, The Hague So Sorting ing do documents uments by b y base se the heme me wit ith h sy synt nthe hetic tic cla lass ssif ifica ication: tion: th the e doub ouble le query uery me meth thod od Claudio

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SLIDE 1

UDC Seminar 2013, The Hague

So Sorting ing do documents uments by b y base se the heme me wit ith h sy synt nthe hetic tic cla lass ssif ifica ication: tion:

th the e doub

  • uble

le query uery me meth thod

  • d

Claudio udio Gn Gnoli

  • li & Alber

berto to Cheti eti

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Knowledge organization A to Z ?... Friday Monday Sathurday Sunday Thursday Tuesday Wednesday

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1 Sunday 2 Monday 3 Tuesday 4 Wednesday 5 Thursday 6 Friday 7 Sathurday Knowledge organization A to Z ?...

A solution: good old classification :-)

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Systematic presentation can act as an intellectual guide to contents

Knowledge organization A to Z ?...

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SLIDE 5

Knowledge organization A to Z ?...

Original German term: Wissensordnung = “ordering of knowledge”

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Classification

Often poorly applied in online resources…

Lack of integration between cataloguers’ and OPACmasters’ work

[Bland & Stoffan, 2008; Rozman, 2009; Casson et al. 2011]

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SLIDE 7

Compound subjects

Most real documents are about combinations of concepts, e.g.: «the corrosion of tinplace by acid fruit products»…

[Foskett 1958]

 Synthetic classmarks needed (subdivisions, auxiliaries, facets, roles, links…)

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Citation order matters

1:34 «philosophy – law» 34:1 «law – philosophy»

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The PRECIS-GRIS tradition

(Verbal) subject strings should be ordered combinations

  • f terms (concepts)

Law – influence of philosophy – U.K. – dictionaries

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Base vs. particular theme

Notions coming from text linguistics

[Beaugrande & Dressler 1981]

«Influence of the abundance of wild ungulates on wolf diet in Northern Apennines»

Wolf – diet – effect of ungulate abundance – N Apennines

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Two-step search [GRIS]

Interfaces should allow to:

  • - identify a concept

(finding the right term, discarding homographs etc.)

  • - examine all combinations
  • f it with other concepts

…starting with those where it is the base theme!

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Double query method

Let’s give the user what (s)he’s asked for: (1) all combinations where the search term is the base theme (2) all combinations where the search term is a particular theme

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An application

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(1) Results as base theme

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…either alone or combined…

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(2) Results as a particular theme

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Double query method

$queryA = "SELECT * FROM `literature` WHERE `classmark` REGEXP '^757*' ORDER BY classmark"; $queryB = "SELECT * FROM `literature` WHERE `classmark` REGEXP ';757*' ORDER BY classmark";

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Position depends on search

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Conclusions

  • - Principles for combination in verbal indexing

(base vs. particular themes) can be extended to classification

  • - They help users to locate

what they are actually searching for among many possible results

  • - They can be applied to search interfaces

by any script (e.g. PHP + MySQL) managing a double query

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SLIDE 20

Thank you! claudio.gnoli@unipv.it @scritur