metadata – the what and why - clarin · the shape of metadata metadata is “transcendental”...
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Metadata – The What and Why
Alexander König The Language Archive, MPI for Psycholinguistics
CLARIN NL: CMDI Tutorial 13th September 2012
www.clarin.eu The Shape of Metadata
Metadata is “transcendental” Data about data: ‘who, what, where and when’ of a document. Structured data about data In the computer age: machine readable data about data Metadata is data describing a (set of) (digital) resource(s)
www.clarin.eu Why Metadata?
Why should you create metadata?
www.clarin.eu Why Metadata?
You do not want your data to float in
the cyberspace and get lost!
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(Re) Finding resources: l Using free text “key words” (Google-
like search) l Special search engines that exploit
the structure of metadata
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l Those who don’t take care over their metadata are doorless.
l Content is expensive to create.
l Just what good is your content if the people who need to read it can’t find it?
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Metadata doesn't need to be in any particular form per se, but... ...if you want computers to understand it and be more useful to humans it should be structured
=> In a standardized fashion using a
metadata model
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There are a lot of different
Metadata Models l Dublin Core (DC) l OLAC l IMDI l CMDI l ...
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Nowadays metadata is more widely used than you might think You probably already deal with metadata on a daily basis without even thinking about it
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For Music (id3)
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For Photos (EXIF)
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The Shape of Metadata
Some common metadata models in the linguistic domain are l Dublin Core (DC) / OLAC l IMDI l CMDI
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www.clarin.eu The Shape of Metadata
Dublin Core (DC) Metadata Set
Content Intellectual Property
Instance
Title Creator Date
Subject Publisher Type
Description Contributor Format
Language Rights Identifier
Relation
Coverage
Source
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DC example [Content] DC.Title = “American Gods” DC.Language = “English” [IP] DC.Creator = “Neil Gaiman” [Instance] DC.Format = “Hardcover” DC.Date = “2001-06-19” DC.Identifier = “0-380-97365-0”
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OLAC extends DC with fields specific to linguistics
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IMDI is a more complex model designed with multimodal resources in mind
www.clarin.eu The Shape of Metadata
l IMDI contains strcutural information (corpus files for building a tree) l Resources are attached to the metadata (session file / bundle)
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