Ch1 content analysis knowledge organization
Sponsored Links
This presentation is the property of its rightful owner.
1 / 26

CH1: Content Analysis knowledge organization PowerPoint PPT Presentation

  • Uploaded on
  • Presentation posted in: General

CH1: Content Analysis knowledge organization. Web is too big to organize?. One billion pages. 1.5 million pages added daily. Why organize in the internet?. Even if you only have a few hundred files, finding them again can take ages. Media archives have millions of files.

Download Presentation

CH1: Content Analysis knowledge organization

An Image/Link below is provided (as is) to download presentation

Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author.While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server.

- - - - - - - - - - - - - - - - - - - - - - - - - - E N D - - - - - - - - - - - - - - - - - - - - - - - - - -

Presentation Transcript

CH1: Content Analysisknowledge organization

Web is too big to organize?

  • One billion pages.

  • 1.5 million pages added daily.

Why organize in the internet?

  • Even if you only have a few hundred files, finding them again can take ages.

  • Media archives have millions of files.

  • Footage/recordings/documents that can’t be found have no value.

  • Free text search only takes you so far .

Why not just use Google?

  • Synonyms and misspellings.

  • Disambiguation .

  • Imperfect knowledge .

  • Meaning beyond the words.

  • Comprehensiveness.

  • Audio-visual assets.

Professional knowledge organization

a core function of the information professional:

  • - to avoid chaos!

    • how many published items?

      • In the US + UK 2005: 378,000

    • how many resources on the web?

      • January 2007: 106,875,138 January 2009 : 9 billion?

  • - to present resources in an orderly and predictable manner.

  • - to enable access to specific content.

  • - to aid retrieval of specific items.

  • - to support exchange of information through the use of standard formats.

How do users look for information?

Retrieval function of KO (knowledge organization)

  • users may search for specific items - known item retrieval.

  • they may search for items characterized by some particular feature.

    • books by a certain author, document forms, etc.

  • they may look for specific information.

    Browsing function of KO(knowledge organization)

  • they may want to see what is available.

  • they may not know what terms to use.

How does knowledge organization support these two approaches?

  • the processes of enabling access to knowledge:-

  • labelling resources.

    • classification

    • indexing

    • tagging

  • building vocabularies.

  • creating formal records to represent resources.

    • cataloguing

    • bibliographic description

    • metadata schemes

  • creating systematic structures to hold information.

  • Classifications:-

    • taxonomies

    • concept and topic maps

    • ontologies

Labelling resources:

  • adding information to a resource about its subject content

  • classification

    • classification schemes and codes

  • subject cataloguing

    • subject heading lists

  • indexing

    • controlled vocabularies, thesauri, keyword lists

  • metadata schema

  • tagging

    • usually uncontrolled

Creating formal records to represent items

  • listing characteristics of an item that represent it

    • what it’s called? name, title

    • who created it? author, creator

    • who published it? publisher (commercial, institutional, personal)

    • when and where? place of publication, web address

    • what’s it about? subject descriptors, classification codes

    • physical attributes? size, dimensions, file type, references, illustrations

  • representing these as fields in a database or equivalent structure

  • using rules to ensure conformity of entries

Systematic structures for the ordering of knowledge

  • sometimes there is a need to present information in a structured way.

  • physical organization: materials in a physical collection.

  • listing: presentation of items such as a subject bibliography or index.

  • display: browsing interface of a digital collection.

Systematic structures for the ordering of knowledge

  • it will be necessary to group items according to subject.

  • this is often described as classification or categorization.

  • the structure can be linear (as in a classification).

  • the structure can be two-dimensional (as in a concept map).

  • hypertext can be used to represent different levels of a hierarchy (as in taxonomies).

Documentary classification for medicine

Taxonomy of government resources

Concept map for concept maps

How do we go about making a KO structure?

  • don’t muddle the design of the interface with the structure of the information.

  • data must be well structured to support browsing and retrieval.

  • the sequence of topics must be logical.

  • the relationships between topics must be clear.

  • overall the structure must be understandable and predictable.

Top-down and bottom-up classifications

  • traditionally classifications were made by repeated subdivision of classes into smaller and smaller units.

  • this tends to create rather rigid and abstract classifications.

  • modern methods tend to work by clustering or grouping concepts to form classes.

  • this method creates more flexible systems, more closely related to reality.

Tree structures

Clustering structures

Sorting and grouping

  • this is the first stage in organizing a collection of objects or concepts.

  • different attributes may be used as the basis of the classification.

  • a whole variety of different (but quite valid) classifications can be made by varying the criteria for arrangement.

  • Login