O documento discute os conceitos e classificações de metadados, linguagens de metadados como Dublin Core e LOM, e padrões como METS para armazenamento de metadados técnicos.

1. BIBLIOTECAS DIGITAIS METADADOS FORMAÇÃO BAD 2008 – Paulo Leitão

20. 5. Linguagens de metadados (DC) 5.2. Exemplos de descrições em DC (www.humbul.ac.uk) Main Title : Biblioteca nacional digital Web Address (URL): http://bnd.bn.pt/ Alternative Title : Digital national library

21. 5. Linguagens de metadados (DC) Description : This is the website of the digital National Library of Portugal, which makes available online a good selection of classic texts in Portuguese. Original works, created by theBiblioteca Nacional, and converted into digital form are categorised as 'authors and personalities' and 'other themes‘. The former includes vast documentation related to, amongst others,Almeida Garrett, Eça de Queirós, Vitorino Nemésio, and Pedro Nunes. This documentation comprises biographies, electronic versions of works, chronologies, and other curiosities. 'Other themes' features individual web pages devoted to, for example, journeys of Portuguese explorers, the new Lusitania (a cartography of Brazil), and 'the Science of Design' which presents the Library's collection of codices…

22. 5. Linguagens de metadados (DC) Language : Portuguese Intended Audience : Further Education Undergraduate Postgraduate/Faculty Responsibility : Author : Biblioteca Nacional Digital Publisher : Biblioteca Nacional Digital Copyright : http://bnd.bn.pt/direito-autor.html

23. 5. Linguagens de metadados (DC) Type of Resource : Collection Primary source Secondary source Research-related Text Document Image Is Part of : Biblioteca Nacional. http://www.biblioteca-nacional.pt/ Humbul Subjects : Portuguese Studies

24. 5. Linguagens de metadados (DC) Catalogued By : Dr Shoshannah Holdom on 2004-05-26 Record Last Modified :2004-05-26 Cite this record : http://www.humbul.ac.uk/output/full2.php?id=12207

26. 5. Linguagens de metadados 5.4. Uma proposta de nível mínimo: Assunto Data Condições de utilização Editor Nome atribuído ao recurso Língua Identificador Tipo Autor/Criador Versão IFLA – Guidance on the structure, content, and application of metadata records for digital resources and collections.

27. 5. Linguagens de metadados 5.5. Linguagens específicas 5.5.1. LOM: Standard for Information technology – Education and Training Systems – Learning objects and metadata This standard will specify the syntax and semantics of Learning Object Metadata, defined as the attributes required to fully/adequately describe a Learning Object. Learning Objects are defined here as any entity, digital or non-digital, which can be used, re-used or referenced during technology supported learning.

28. 5. Linguagens de metadados Examples of technology supported learning include computer-based training systems , interactive learning environments, intelligent computer-aided instruction systems, distance learning systems , and collaborative learning environments. Examples of Learning Objects include multimedia content ,instructional content, learning objectives, instructional software and software tools, and persons, organizations, or events referenced during technology supported learning.

29. 5. Linguagens de metadados The Learning Object Metadata standards will focus on the minimal set of attributes needed to allow these Learning Objects to be managed, located, and evaluated. The standards will accommodate the ability for locally extending the basic fields and entity types, and the fields can have a status of obligatory (must be present) or optional (maybe absent).

30. 5. Linguagens de metadados Relevant attributes of Learning Objects to be described include type of object , author , owner , terms of distribution , and format . Where applicable, Learning Object Metadata may also include pedagogical attributes such as: teaching or interaction style , grade level , mastery level , and prerequisites . It is possible for any given Learning Object to have more than one set of Learning Object Metadata. (IEEE - http://ltsc.ieee.org/wg12/)

31. 5. Linguagens de metadados 5.5.2. Gateway to Educational Materials (GEM) Application profiles for GEM 2.0 including GEM (in general), Gateway Lite and Gateway Full - http://64.119.44.148/about/documentation/ApplicationProfiles-9-8-04/

32. 5. Linguagens de metadados 5.5.3. ONIX Onix for Books: product information message: overview and data elements: release 2.1., version 0.3, January 2006 http://www.editeur.org/onixfiles2.1/prodinf%202.1rev3.html 5.5.4. Content Standard for digital geospatial metadata (Federal Geographic Data Committee) - http://www.fgdc.gov/metadata/csdgm/

33. 5. Linguagens de metadados 5.5.5. VRA core categories , (Visual Resources Association Core Categories) The VRA Core Categories, Version 3.0 (actualmente versão 4.0) consist of a single element set that can be applied as many times as necessary to create records to describe works of visual culture as well as the images that document them. http://www.vraweb.org/projects/vracore4/index.html Exemplos: http://gort.ucsd.edu/escowles/vracore4/

34. 5. Linguagens de metadados 5.6. Metadados Técnicos METS (Metadata Encoding and Transmission Standard) – Library of Congress “ Sem metadados estruturais, os ficheiros com imagens ou texto que compõem a obra digital serão de pouca utilidade, e sem metadados técnicos sobre o processo de digitalização, os investigadores poderão ter dúvidas sobre a exactidão da reflexão do original que a versão digital oferece.

35. 5. Linguagens de metadados Por questões de gestão interna, a biblioteca deve ter acesso a metadados técnicos apropriados para lhe permitir refrescar e migrar os dados, garantindo a durabilidade de recursos valiosos.” METS: introdução e tutorial (http://www.loc.gov/standards/mets/METSOverview.v2_port.html)

37. 5. Linguagens de metadados - Cabeçalho METS metsHdr CREATEDATE =&quot;2003-07-04T15:00:00&quot; RECORDSTATUS =&quot;Complete&quot;> <agent ROLE=&quot;CREATOR&quot; TYPE=&quot;INDIVIDUAL&quot;> <name>Jerome McDonough</name> </agent> <agent ROLE=&quot;ARCHIVIST&quot; TYPE=&quot;INDIVIDUAL&quot;> <name>Ann Butler</name> </agent> </metsHdr>

38. 5. Linguagens de metadados b) Metadados Descritivos <dmdSec ID=&quot;dmd001&quot;> <mdRef LOCTYPE=&quot;URN&quot; MIMETYPE=&quot;application/xml&quot; MDTYPE=&quot;EAD&quot; LABEL=&quot;Berol Collection Finding Aid&quot;>urn:x-nyu:fales1735</mdRef> </dmdSec>

39. 5. Linguagens de metadados c) Metadados administrativos / técnicos <techMD ID=&quot;AMD001&quot;> <mdWrap MIMETYPE=&quot;text/xml&quot; MDTYPE=&quot;NISOIMG&quot; LABEL=&quot;NISO Img. Data&quot;> <xmlData> <niso: MIMEtype >image/tiff</niso:MIMEtype> <niso:Compression>LZW</niso:Compression> <niso: PhotometricInterpretation >8</niso:PhotometricInterpretation> <niso:Orientation>1</niso:Orientation> <niso:ScanningAgency>NYU Press</niso:ScanningAgency> </xmlData> </mdWrap> </techMD>

40. 5. Linguagens de metadados d) Secção de ficheiros </fileGrp> <fileGrp ID=&quot;VERS2&quot;> <file ID=&quot;FILE002&quot; MIMETYPE=&quot;audio/wav&quot; SIZE=&quot;64232836&quot; CREATED=&quot;2001-05-17&quot; GROUPID=&quot;AUDIO1&quot;> <FLocat LOCTYPE=&quot;URL&quot;>http://dlib.nyu.edu/tamwag/beame.wav</FLocat> </file>

41. 5. Linguagens de metadados e) Mapa Estrutural <structMap TYPE=&quot;logical&quot;> <div ID=&quot;div1&quot; LABEL=&quot;Oral History: Mayor Abraham Beame&quot; TYPE=&quot;história falada&quot;> <div ID=&quot;div1.1&quot; LABEL=&quot;Interviewer Introduction&quot; ORDER=&quot;1&quot;> <fptr FILEID=&quot;FILE001&quot;> <area FILEID=&quot;FILE001&quot; BEGIN=&quot;INTVWBG&quot; END=&quot;INTVWND&quot; BETYPE=&quot;IDREF&quot; />

42. 5. Linguagens de metadados f) Ligações estruturais <div ID=&quot;P1&quot; TYPE=&quot;page&quot; LABEL=&quot;Page 1&quot;> <fptr FILEID=&quot;HTMLF1&quot;/> <div ID=&quot;IMG1&quot; TYPE=&quot;image&quot; LABEL=&quot;Imagem com hiperligação para a página 2&quot;> <fptr FILEID=&quot;JPGF1&quot;/> </div> <div ID=&quot;P2&quot; TYPE=&quot;page&quot; LABEL=&quot;Page 2&quot;> <fptr FILEID=&quot;HTMLF2&quot;/> </div>

43. 5. Linguagens de metadados g) Comportamento <METS:behavior ID=&quot;DISS1.1&quot; STRUCTID=&quot;S1.1&quot; BTYPE=&quot;uva-bdef:stdImage&quot; CREATED=&quot;2002-05-25T08:32:00&quot; LABEL=&quot;UVA Std Image Disseminator&quot; GROUPID=&quot;DISS1&quot; ADMID=&quot;AUDREC1&quot;> <METS:interfaceDef LABEL=&quot;UVA Standard Image Behavior Definition&quot; LOCTYPE=&quot;URN&quot; xlink:href=&quot;uva-bdef:stdImage&quot;/> <METS:mechanism LABEL=&quot;A NEW AND IMPROVED Image Mechanism&quot; LOCTYPE=&quot;URN&quot; xlink:href=&quot;uva-bmech:BETTER-imageMech&quot;/> </METS:behavior>

44. 5.2. Metadados técnicos a partir do formato TIFF – tagged image file format Etiqueta Designação Conteúdo 256 ImageWidth (N.º de pixels na horizontal) 257 ImageLenght (N.º de pixels na vertical) 258 BitsPerSample 1 (p&b) 8 (escala cinza) 16 (negativos) 24 (cor) 259 Compression 1 (sem compressão) 262 PhotometricInterpretation 0 (p/p&b, whiteIsZero, default) 1 (black is zero) 2 (cor, default para RGB) 266 FillOrder 1 (default) 2 269 DocumentName Cota e código de barras, quando houver, separados por vírgula 270 ImageDescription [a definir para cada colecção] 271 Make (fabricante do equipamento de captura) 272 Model (modelo do equipamento de captura) 273 StripOffsets (o byte offset de cada strip) 277 SamplesPerPixel 1 (default para p&b e escala cinza) 3 (default para RGB) 278 RowsPerStrip (N.º de linhas por strip) 279 StripByteCount Não preenche, não há compressão 282 Xresolution (N.º de pixels/unidade de resolução na horizontal) 283 Yresolution (N.º de pixels/unidade de resolução na vertical) 296 ResolutionUnit 2 (polegadas) 305 Software (programa de captura usado) 306 DateTime (data e hora de captura, formato YYYY:MM:DD HH:MM:SS) 315 Artist [a definir para cada colecção] 316 HostComputer (computador e sistema operativo em que se digitaliza) 33432 Copyright FCG Biblioteca de Arte

45. 5.2. Metadados técnicos a partir do formato TIFF – tagged image file format Visualização de etiquetas TIFF numa imagem digitalizada - exemplo

46. 5. Linguagens de metadados 5.3. Perfis aplicacionais 5.3.1. Espaços normativos e perfis aplicacionais Conceito de Espaço Normativo 5.3.2. Perfis aplicacionais “ Application profiles consist of data elements drawn from one or more namespace schemas combined together by implementors and optimised for a particular local application”

49. 5. Linguagens de metadados 5.4. Mapeamentos entre linguagens Exemplo 1: Acesso URN à PORBASE http://urn.porbase.org/acesso.urn Exemplo 2: Dublin Core to UNIMARC – www.ukoln.ac.uk/metadata/interoperability/dc_unimarc.htm

50. 6. Formatos XML  RDF RDF= RESOURCE DESCRIPTION FRAMEWORK Especificação de XML para formatar metadados.

63. 8. Seleccionar um esquema de metadados Discussão do texto: “Selecting a metadata schema or schemas”, in Guidance on……

64. 8. Seleccionar um esquema de metadados Discussão do texto: “Selecting a metadata schema or schemas”, in Guidance on……

68. 9. Partilhar e disponibilizar Metadados