METS: An Introduction

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´╗┐METS: An Introduction Towards a Digital Object Standard Rick Beaubien Library Systems Office U.C. Berkeley

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What is METS? Metadata Encoding and Transmission Standard A XML diagram based particular for encoding "center point" reports for materials whose substance is computerized . Center point doc draws together scattered yet related records METS utilizes XML to give a vocabulary and linguistic structure to distinguishing the computerized pieces that together include an advanced element, for determining the area of these pieces, and for communicating the basic connections between them. Content documents Descriptive metadata Administrative metadata

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History of METS Originates in Making of America II activity Making of America II (MOA2) was a Digital Library Federation supported activity that began in 1997. Members included UCB (lead), Stanford, Penn State, Cornell, and NYPL. Objective: to make an advanced protest standard for encoding basic, graphic and managerial metadata alongside essential substance RESULT: MOA2.DTD (a XML DTD)

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History of METS (cont'd) UCB Library and CDL embrace MOA2 Other organizations (LC, Harvard) consider Additional necessities rise Support for time-based substance More adaptability in Descriptive and Administrative metadata MOA2 overhauled : Starting in February 2001 concerned gatherings meet to audit and reconsider MOA2 Outcome: mets.xsd

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Main Provisions of METS Schema Identifying the records or parts of documents that involve the substance of a computerized element, and communicating the structure or structures of this substance Linking Descriptive metadata with computerized content Linking Administrative metadata with advanced substance Linking conduct definitions and program code with advanced substance and with related expressive and regulatory metadata Wrapping advanced substance, and related illustrative and authoritative metadata as parallel information.

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1. Distinguishing Content and Expressing Its Structure METS accommodates indicating What records constitute the substance of a computerized question How these fit together into an organized entire What content documents? Reply: any : Image: jpeg, gif, tiff, sid, and so forth Text/encoded content: txt, sgml, html, xml Audio/Video: avi, mpeg, wav, midi What content structure? Reply: any various leveled structure (physical, coherent)

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2. Connecting Descriptive Metadata with Digital Content METS does not itself give a vocabulary and language structure to encoding graphic metadata (no distinct metadata components characterized in METS) METS provides a methods for indicating outer enlightening metadata or potentially to include engaging metadata inside. METS gives a way to connecting this metadata to the computerized substance of the element.

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3. Connecting Administrative Metadata with Digital Content METS does not itself give a vocabulary and language structure to encoding managerial metadata (no authoritative metadata components characterized in METS) METS provides a methods for indicating outside regulatory metadata or potentially to include authoritative metadata inside. METS accommodates connecting this metadata to the computerized content .

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4. Organizing Dissemination Behaviors with Digital Content METS gives a way to connecting advanced substance with an interface that characterizes the accessible spreads and the required parameters for every dispersal programming that executes this interface

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5. Wrapping Binary Content A METS question can wrap the substance of an advanced element as double information, and all related distinct and managerial metadata. This capacity of METS gives it awesome potential for filing purposes.

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Uses of METS Transfer grammar standard for transmitting/trading advanced items. Taste (Open Archival Information Systems Reference Model) Functional grammar: reason for giving end clients the capacity to see and explore advanced substance and its related metadata DIP Archiving linguistic structure standard for documenting computerized objects . AIP

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Anatomy of a METS archive METS occasion records comprise of up to 6 areas Header Descriptive Metadata Section Administrative Metadata Section File Section Structural Map Section Behavior segment

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Anatomy of a METS report METS occurrence archives comprise of up to 6 segments Header (Optional) Descriptive Metadata Section (Optional) Administrative Metadata Section (Optional) File Section (Optional yet run of the mill) Structural Map Section (Required) Behavior segment (Optional)

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1. METS Header Records managerial metadata about METS archive itself, for example, Author/specialist & operator part Alternate identifiers for METS report Creation and overhaul dates and times Status

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2. Enlightening Metadata Section(s) Can record the majority of the units of elucidating metadata relating to the computerized element spoke to by METS report Descriptive metadata could take any frame including MARC record, Finding Aid, Dublin Core record Descriptive Metadata might be External to the METS archive Internal to the METS record Both outer and inward

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External Descriptive Metadata Descriptive metadata component in a METS record may essentially distinguish the sort of spellbinding metadata it speaks to (MARC, EAD, and so forth), and indicate this metadata in its outside area through a URI

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Internal Descriptive Metadata Descriptive metadata might be recorded inside in a METS archive in one of two ways Using vocabulary and sentence structure determined in outer XML standard. For instance, Dublin Core, MARC, MODS. As twofold information. For instance, a standard MARC record could essentially be joined as double information into METS report.

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dmdSec mdRef dmdSec mdWrap mdRef dmdSec mdWrap Descriptive Metadata Section Descriptive Md Sections External DescriptiveMD

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3. Regulatory Metadata Section(s) Can record the greater part of the units of authoritative metadata related to the METS protest or its parts Administrative metadata components come in 4 flavors Technical metadata Source Metadata Rights Metadata Digital Provenance Metadata

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3. Regulatory Metadata Section(s) Administrative metadata might be External to the METS record Internal to the METS archive Both outside and inside

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External Administrative Metadata Administrative metadata component in a METS report may just distinguish the sort of managerial metadata it speaks to (NISOIMG, LC-AV, and so forth), and indicate this metadata in its outer area by means of a URI.

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Internal Administrative Metadata Administrative metadata might be recorded inside in a METS report in one of two ways Using vocabulary and language structure indicated in outer XML standard. As parallel information.

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Administrative Metadata Section Administrative Md External AdminMD amdSec techMD mdRef mdWrap sourceMD digiprovMD rightsMD

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4. Record Section Records the majority of the documents that together contain the substance of the advanced element spoke to by the METS archive Files are composed into File Groups in light of organization (tiff, greetings res jpeg, med-res jpeg, gif, and so forth)

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4. Record Section (cont'd) A document component may allude to an outer substance record, or itself contain the document substance, or both. Outer substance document. Document component may indicate an outside substance record through a URI. Inward substance record. Record component may itself contain the document substance as twofold information.

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File Section File Section fileSec fileGrp External Content record Flocat FContent document

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Linking Files with Administrative Metadata Files and File Groups may indicate apropos managerial metadata components in the Administrative Metadata Section of the METS archive. Document or record gathering may indicate: Technical Metadata component: specialized data Rights Metadata component: get to confinements, and so on Source Metadata component: information about unique Digital Provenance metadata component: changes that created the document

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Linking Files with AdminMD Administrative Md File Section fileSec External AdminMD amdSec techMD fileGrp mdRef record mdWrap sourceMD digiprovMD rightsMD

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5. Auxiliary Map Section(s) Specifies the (various leveled) structure of the advanced substance spoke to by the METS archive. Indicates how the substance documents (the records recorded in the Files Section) fit into this structure. More than one structure might be indicated. For instance: a consistent structure and a physical structure

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Expressing the Structure The basic guide breaks down an advanced question into a chain of command of Division (div) components: Division (type="photoalbum") Division (type="page") Division (type="photo") Division (type="photo") DIvision (type="photo") Division (type="page") Division (type="photo") Division (type="photo")

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Linking Structure with Simple Content Simple substance: Content is straightforward when the different appearances of a division are each spoken to by a solitary, entire record. Illustration: page showed by a thumbnail, med-res jpeg, and howdy res jpeg. Division basically contains a pointer to every document component in the record list that speaks to a sign of the Division

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Linking Structure with Complex Content Complex substance. METS suits different sorts of complex substance. Content communicated by subsection of document. Division indicates not only a record spoke to in a document list, however to a specific territory inside in that record. Content (interpretations): references Begin/End ids inside organized content. A/V: references a BeginTime and EndTime or Extent Image/2-D: Internal shape and arranges

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Linking Structure with Complex Content Complex substance (cont'd): Content communicated by records that must be "played/shown" in succession Division focuses to a grouping of documents or sectio

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