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METS  April 2001

METS April 2001

Subject:

METS Draft

From:

Jerome McDonough <[log in to unmask]>

Reply-To:

Metadata Encoding and Transmission Standard <[log in to unmask]>

Date:

Mon, 23 Apr 2001 16:54:02 -0400

Content-Type:

multipart/mixed

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Parts/Attachments

text/plain (16 lines) , mets.xsd (549 lines) , Unknown Name (9 lines)

Greetings,

Attached you will find a draft release of the METS schema which I've created
based on our discussions in February.  I've tried to keep the design of this
schema fairly closely in line with the original MOA2 DTD, while adding the
necessary new functionality, and disposing of restrictions in MOA2 that
were problematic.  I will attempt to come up with an example document based
on an oral history on file here at NYU and distribute that, so that people can
see how I envision the new linking facilities for audio/video materials.

If you have comments about the draft that you want to circulate before
the meeting in San Francisco, please feel free to send them along to the list.
Thanks, and see you all soon.




<?xml version="1.0" encoding="UTF-8"?> <!-- METS: Metadata Encoding and Transmission Standard --> <!-- Prepared for the Digital Library Federation by Jerome McDonough, New York University.--> <!-- April 23, 2001 --> <!-- Version 1.0 (alpha) --> <!-- Change History --> <!-- April 23, 2001: Alpha Draft completed --> <xsd:schema targetNamespace="http://www.loc.gov/METS/" xmlns="http://www.loc.gov/METS/" xmlns:xsd="http://www.w3.org/2000/10/XMLSchema" elementFormDefault="qualified" attributeFormDefault="unqualified">         <xsd:element name="mets" type="metsType">                 <xsd:annotation>                         <xsd:documentation>METS: Metadata Encoding and Transmission Standard.                         METS is intended to provide a standardized XML format for transmission                         of complex digital library objects between systems. As such, it can be seen                         as filling a role similar to that defined for the Submission Information Package                         (SIP) and Dissemination Information Package (DIP) in the Reference Model                         for an Open Archival Information System.                         </xsd:documentation>                 </xsd:annotation>         </xsd:element>         <xsd:element name="dmdSec" type="mdSecType">                 <xsd:annotation>                         <xsd:documentation>dmdSec: Description Metadata Section.                         This section records all of the descriptive metadata for all subobjects in the METS object.                         Metadata can be either included in the METS hub document (mdWrap) or                         referenced via an identifier/locator (mdRef), a la Warwick Framework. Multiple                         mdRef and mdWrap elements are allowed so that descriptive metadata                         can be recorded for each separate subobject within the METS object.</xsd:documentation>                 </xsd:annotation>         </xsd:element>         <xsd:element name="amdSec" type="amdSecType">                 <xsd:annotation>                         <xsd:documentation>amdSec: Administrative Metadata Section.                         This section records all of the administrative metadata for all subobjects in the METS object,                         and is divided into four subsections: techMD (technical metadata), rightsMD                         (intellectual property rights metadata), sourceMD (provenance metadata) and                         preservation (preservation metadata). Each of these subsections follows the                         mdSecType model, so that they can either include metadata within the METS                         hub document (mdWrap) or reference it via an identifier/locator (mdRef). Multiple                         mdRef and mdWrap elements are allowed so that administrative metadata                         can be recorded for each separate subobject within the METS object.</xsd:documentation>                 </xsd:annotation>         </xsd:element>         <xsd:element name="fileGrp" type="fileGrpType">                 <xsd:annotation>                         <xsd:documentation>fileGrp: File Group.                         File Groups record information regarding all of the data files comprising                         the digital object, including both master files and derivatives. File Groups                         may both repeat and nest to provide an organizing framework for data files.                         </xsd:documentation>                 </xsd:annotation>         </xsd:element>         <xsd:element name="structMap">                 <xsd:annotation>                         <xsd:documentation>structMap: Structural Map.                         The structural map is the heart of a METS document, defining the                         hierarchical arrangement of a primary source document which has                         been digitized. This hierarchy is encoded as a tree of 'div' elements.                         Any given 'div' can point to another METS document via the 'mptr'                         element, or to a single file, to a group of files, or to segments of individual                         files or groups of files through the 'fptr' and subsidiary elements.                         </xsd:documentation>                 </xsd:annotation>                 <xsd:complexType>                         <xsd:complexContent>                                 <xsd:extension base="structMapType"/>                         </xsd:complexContent>                 </xsd:complexType>         </xsd:element>         <xsd:element name="div" type="divType">                 <xsd:annotation>                         <xsd:documentation>div: Division of a structural map.                                 Nested div elements define the hierarchical structure of the digital library object.                                 Div elements are linked to the content corresponding to that div by subsidiary mptr and                                 fptr elements. Div elements have the following attributes:                                 1. ID (an XML ID);                                 2. N: an integer representation of this div's order among its siblings (e.g., its page number);                                 3. NUMBER: a string representation of this div's order among its siblings (e.g., "Page xii");                                 4. LABEL: a string to describe this div to an end user viewing the document, as per                                 a table of contents entry; and                                 5. DMD: a set of IDREFs to descriptive metadata sections within this METS document                                 applicable to this div.                         </xsd:documentation>                 </xsd:annotation>         </xsd:element>         <xsd:complexType name="metsType">                 <xsd:annotation>                         <xsd:documentation>mets Complex Type.                         A METS document consists of four possible subsidiary sections:                         dmdSec (descriptive metadata section), amdSec (administrative                         metadata section), fileGrp (file inventory group), and structMap                         (structural map). It also has four possible attributes: ID (an XML                         ID), OBJID (a primary identifier assigned to the original source                         document), LABEL (a title/text string identifying the document for                         users), and TYPE (a type for the object, e.g., book, journal,                         stereograph, etc.).</xsd:documentation>                 </xsd:annotation>                 <xsd:sequence>                         <xsd:element ref="dmdSec" minOccurs="0" maxOccurs="unbounded"/>                         <xsd:element ref="amdSec" minOccurs="0" maxOccurs="unbounded"/>                         <xsd:element ref="fileGrp" maxOccurs="unbounded"/>                         <xsd:element ref="structMap" maxOccurs="unbounded"/>                 </xsd:sequence>                 <xsd:attribute name="ID" type="xsd:ID" use="optional"/>                 <xsd:attribute name="OBJID" type="xsd:string" use="optional"/>                 <xsd:attribute name="LABEL" type="xsd:string" use="optional"/>                 <xsd:attribute name="TYPE" type="xsd:string" use="optional"/>         </xsd:complexType>         <xsd:complexType name="amdSecType">                 <xsd:annotation>                         <xsd:documentation>amdSecType: Complex Type for Administrative Metadata.                         The administrative metadata section consists of four possible subsidiary                         sections: techMD (technical metadata for text/image/audio/video files),                         rightsMD (intellectual property rights metadata), sourceMD (source                         metadata i.e. provenance), and preservationMD (preservation metadata                         necessary to maintain the digital library object in the long term). amdSecType                         has a single attribute, ID (XML ID).</xsd:documentation>                 </xsd:annotation>                 <xsd:sequence>                         <xsd:element name="techMD" type="mdSecType" minOccurs="0" maxOccurs="unbounded">                                 <xsd:annotation>                                         <xsd:documentation>techMD: technical metadata.                                                 The techMD element provides a wrapper around a generic metadata section,                                                 which should contain technical metadata regarding a file or files. It has a single                                                 attribute, ID, which file/fileGrp elements can use to reference the technical                                                 metadata that applies to them.                                         </xsd:documentation>                                 </xsd:annotation>                         </xsd:element>                         <xsd:element name="rightsMD" type="mdSecType" minOccurs="0" maxOccurs="unbounded">                                 <xsd:annotation>                                         <xsd:documentation>rightsMD: intellectual property rights metadata.                                                 The rightsMD element provides a wrapper around a generic metadata section,                                                 which should contain IP rights metadata. It has a single attribute, ID, which                                                 file/fileGrp/div elements can use to reference IP Rights metadata that applies to them.                                         </xsd:documentation>                                 </xsd:annotation>                         </xsd:element>                         <xsd:element name="sourceMD" type="mdSecType" minOccurs="0" maxOccurs="unbounded">                                 <xsd:annotation>                                         <xsd:documentation>sourceMD: source metadata.                                                 The sourceMD element provides a wrapper around a generic metadata section                                                 which should contain source/provenance information. It has a single attribute,                                                 ID, which file/fileGrp elements can use to reference the source metadata which                                                 applies to them.                                         </xsd:documentation>                                 </xsd:annotation>                         </xsd:element>                         <xsd:element name="preservationMD" type="mdSecType" minOccurs="0" maxOccurs="unbounded">                                 <xsd:annotation>                                         <xsd:documentation>preservationMD: preservation metadata.                                                 The preservationMD element provides a wrapper around a generic metadata                                                 section which should contain preservation metadata. It has a single attribute,                                                 ID, which file/fileGrp elements can use to reference the preservation metadata                                                 which applies to them.                                         </xsd:documentation>                                 </xsd:annotation>                         </xsd:element>                 </xsd:sequence>                 <xsd:attribute name="ID" type="xsd:ID" use="optional"/>         </xsd:complexType>         <xsd:complexType name="fileGrpType">                 <xsd:annotation>                         <xsd:documentation>fileGrpType: Complex Type for File Groups.                                 The file group is used to cluster all of the digital files composing a digital                                 library object in a hierarchical arrangement (fileGrp is recursively defined                                 to enable the creation of the hierarchy). Any file group may contain zero or                                 more file elements. File elements in turn can contain a FLocat element                                 (a pointer to a file containing content for this object) and/or a FContent                                 element (the contents of the file Base64 encoded).                         </xsd:documentation>                 </xsd:annotation>                 <xsd:choice>                         <xsd:element ref="fileGrp" minOccurs="0" maxOccurs="unbounded"/>                         <xsd:element name="file" minOccurs="0" maxOccurs="unbounded">                                 <xsd:annotation>                                         <xsd:documentation>file: File element.                                                 The file element provides access to content files for a METS document.                                                 It has the following attributes:                                                 1. ID: an XML ID for the element;                                                 2. MIMETYPE: the MIME type for the file;                                                 3. SEQ: an integer indicating the sequence of this file relative to the others in its file group;                                                 4. SIZE: the size of the file in bytes;                                                 5. CREATED: the date of creation for the file;                                                 6. OWNERID: a primary identifier assigned to the file by its owner;                                                 7. ADMID: IDREFS to administrative metadata sections in the METS document                                                 that correspond with this file; and                                                 8. GROUPID: an identifier that establishes a correspondence between this file                                                 and files in other file groups. Typically, this will be used to associate a master                                                 file in one file group with derivative files in other file groups.                                                 A file element may contain an FLocat element, which provides a pointer to                                                 a content file, and/or an FContent element, which wraps an encoded version                                                 of the file.                                         </xsd:documentation>                                 </xsd:annotation>                                 <xsd:complexType>                                         <xsd:sequence>                                                 <xsd:element name="FLocat" minOccurs="0">                                                         <xsd:annotation>                                                                 <xsd:documentation>FLocat: File Location.                                                                         The FLocat element provides a pointer to the location of a content file.                                                                         It has two attributes: ID (an XML ID), and LOCTYPE (the type of locator                                                                         contained in the FLocat element).                                                                 </xsd:documentation>                                                         </xsd:annotation>                                                         <xsd:complexType>                                                                 <xsd:simpleContent>                                                                         <xsd:extension base="xsd:string">                                                                                 <xsd:attribute name="ID" type="xsd:ID" use="optional"/>                                                                                 <xsd:attribute name="LOCTYPE" use="required">                                                                                         <xsd:simpleType>                                                                                                 <xsd:restriction base="xsd:string">                                                                                                         <xsd:enumeration value="URN"/>                                                                                                         <xsd:enumeration value="URL"/>                                                                                                         <xsd:enumeration value="PURL"/>                                                                                                         <xsd:enumeration value="HANDLE"/>                                                                                                         <xsd:enumeration value="DOI"/>                                                                                                         <xsd:enumeration value="PDI"/>                                                                                                 </xsd:restriction>                                                                                         </xsd:simpleType>                                                                                 </xsd:attribute>                                                                         </xsd:extension>                                                                 </xsd:simpleContent>                                                         </xsd:complexType>                                                 </xsd:element>                                                 <xsd:element name="FContent" minOccurs="0">                                                         <xsd:annotation>                                                                 <xsd:documentation>FContent: file content.                                                                         The FContent element is used to deliver a content file for a METS                                                                         document within the METS file itself. The content file must be Base 64                                                                         encoded, and contained within the FContent wrapper element.                                                                 </xsd:documentation>                                                         </xsd:annotation>                                                         <xsd:complexType>                                                                 <xsd:simpleContent>                                                                         <xsd:extension base="xsd:binary">                                                                                 <xsd:attribute name="ID" type="xsd:ID" use="optional"/>                                                                         </xsd:extension>                                                                 </xsd:simpleContent>                                                         </xsd:complexType>                                                 </xsd:element>                                         </xsd:sequence>                                         <xsd:attribute name="ID" type="xsd:ID" use="required"/>                                         <xsd:attribute name="MIMETYPE" type="xsd:string" use="optional"/>                                         <xsd:attribute name="SEQ" type="xsd:int" use="optional"/>                                         <xsd:attribute name="SIZE" type="xsd:long" use="optional"/>                                         <xsd:attribute name="CREATED" type="xsd:date" use="optional"/>                                         <xsd:attribute name="OWNERID" type="xsd:string" use="optional"/>                                         <xsd:attribute name="ADMID" type="xsd:IDREFS" use="optional"/>                                         <xsd:attribute name="GROUPID" type="xsd:string" use="optional"/>                                 </xsd:complexType>                         </xsd:element>                 </xsd:choice>                 <xsd:attribute name="ID" type="xsd:ID" use="optional"/>                 <xsd:attribute name="VERSDATE" type="xsd:date" use="optional"/>                 <xsd:attribute name="ADMIDS" type="xsd:IDREFS" use="optional"/>         </xsd:complexType>         <xsd:complexType name="structMapType">                 <xsd:annotation>                         <xsd:documentation>structMap Complex Type</xsd:documentation>                 </xsd:annotation>                 <xsd:sequence maxOccurs="unbounded">                         <xsd:element name="div" type="divType">                                 <xsd:annotation>                                         <xsd:documentation>div: Division.                                                 The METS standard represents a document structurally as a series of nested                                                 div elements, that is, as a hierarchy (e.g., a book, which is composed of chapters,                                                 which is composed of subchapters, which is composed of pages). Every div node                                                 in the structural map hierarchy may be connected (via subsidiary mptr or fptr                                                 elements) to content files which represent that div's portion of the whole document.                                                 The div element has the following attributes:                                                 1. ID (an XML ID);                                                 2. N: an integer representation of this div's order among its siblings                                                 (e.g., its page number);                                                 3. NUMBER: a string representation of this div's order among its siblings (e.g., "Page xii");                                                 4. LABEL: a string to describe this div to an end user viewing the document, as per                                                 a table of contents entry; and                                                 5. DMD: a set of IDREFs to descriptive metadata sections within this METS document                                                 applicable to this div.                                         </xsd:documentation>                                 </xsd:annotation>                         </xsd:element>                 </xsd:sequence>                 <xsd:attribute name="ID" type="xsd:ID" use="optional"/>         </xsd:complexType>         <xsd:complexType name="divType">                 <xsd:annotation>                         <xsd:documentation>Div Complex Type</xsd:documentation>                 </xsd:annotation>                 <xsd:sequence>                         <xsd:element name="mptr" minOccurs="0" maxOccurs="unbounded">                                 <xsd:annotation>                                         <xsd:documentation>mptr: METS Pointer.                                                 The mptr element allows a div to be associated with a separate METS document                                                 containing the content corresponding with that div, rather than pointing to an                                                 internal file or file group. A typical instance of this would be the case of a METS                                                 document for a journal run, with a div elements for each individual journal issue.                                                 The div elements for the issues might point to separate METS documents for each                                                 issue, rather than having files and file groups for every issue encoded in one                                                 document. The mptr is derived from the XLink recommendation of the W3C,                                                 and should be used according to W3C guidelines.                                         </xsd:documentation>                                 </xsd:annotation>                                 <xsd:complexType>                                         <xsd:attribute name="ID" type="xsd:ID" use="optional"/>                                         <xsd:attribute name="type" type="xsd:string" use="fixed" value="simple"/>                                         <xsd:attribute name="href" type="xsd:uriReference" use="required"/>                                         <xsd:attribute name="role" type="xsd:string"/>                                         <xsd:attribute name="arcrole" type="xsd:string"/>                                         <xsd:attribute name="title" type="xsd:string"/>                                         <xsd:attribute name="show">                                                 <xsd:simpleType>                                                         <xsd:restriction base="xsd:NMTOKEN">                                                                 <xsd:enumeration value="new"/>                                                                 <xsd:enumeration value="replace"/>                                                                 <xsd:enumeration value="embed"/>                                                                 <xsd:enumeration value="other"/>                                                                 <xsd:enumeration value="none"/>                                                         </xsd:restriction>                                                 </xsd:simpleType>                                         </xsd:attribute>                                         <xsd:attribute name="actuate">                                                 <xsd:simpleType>                                                         <xsd:restriction base="xsd:NMTOKEN">                                                                 <xsd:enumeration value="onLoad"/>                                                                 <xsd:enumeration value="onRequest"/>                                                                 <xsd:enumeration value="other"/>                                                                 <xsd:enumeration value="none"/>                                                         </xsd:restriction>                                                 </xsd:simpleType>                                         </xsd:attribute>                                 </xsd:complexType>                         </xsd:element>                         <xsd:element name="fptr" minOccurs="0" maxOccurs="unbounded">                                 <xsd:annotation>                                         <xsd:documentation>fptr: File Pointer.                                                 The fptr element associates a div element with content files that represent that div.                                                 It can either point to a file directly itself, via the FILEID attribute, or it can do more                                                 complex links to content via the subsidiary par and seq elements.                                         </xsd:documentation>                                 </xsd:annotation>                                 <xsd:complexType>                                         <xsd:choice>                                                 <xsd:element name="par" minOccurs="0">                                                         <xsd:annotation>                                                                 <xsd:documentation>par: Parallel files.                                                                         The par element should used to link a div to a set of content files when                                                                         those files should be played back in unison to display the content to the                                                                         user. Individual area subelements within the par element provide the links                                                                         to the files or portions thereof.                                                                 </xsd:documentation>                                                         </xsd:annotation>                                                         <xsd:complexType>                                                                 <xsd:sequence>                                                                         <xsd:element name="area" type="areaType" maxOccurs="unbounded"/>                                                                 </xsd:sequence>                                                                 <xsd:attribute name="ID" type="xsd:ID" use="optional"/>                                                         </xsd:complexType>                                                 </xsd:element>                                                 <xsd:element name="seq" minOccurs="0">                                                         <xsd:annotation>                                                                 <xsd:documentation>seq: Sequence of files.                                                                         The seq element should be used to link a div to one or more content files                                                                         when those files should be played sequentially to display content to a user,                                                                         or where there is only one file to link, but the link from div to file requires                                                                         identifying a subcomponent of a file.                                                                 </xsd:documentation>                                                         </xsd:annotation>                                                         <xsd:complexType>                                                                 <xsd:sequence>                                                                         <xsd:element name="area" type="areaType" maxOccurs="unbounded"/>                                                                 </xsd:sequence>                                                                 <xsd:attribute name="ID" type="xsd:ID" use="optional"/>                                                         </xsd:complexType>                                                 </xsd:element>                                         </xsd:choice>                                         <xsd:attribute name="ID" type="xsd:ID" use="optional"/>                                         <xsd:attribute name="FILEID" type="xsd:IDREF" use="optional"/>                                 </xsd:complexType>                         </xsd:element>                         <xsd:element ref="div" minOccurs="0" maxOccurs="unbounded"/>                 </xsd:sequence>                 <xsd:attribute name="ID" type="xsd:ID" use="optional"/>                 <xsd:attribute name="N" type="xsd:integer" use="optional"/>                 <xsd:attribute name="NUMBER" type="xsd:string" use="optional"/>                 <xsd:attribute name="LABEL" type="xsd:string" use="optional"/>                 <xsd:attribute name="DMD" type="xsd:IDREFS" use="optional"/>         </xsd:complexType>         <xsd:complexType name="areaType">                 <xsd:annotation>                         <xsd:documentation>areaType: Complex Type for Area linking.                                 The area element provides for more sophisticated linking between a div                                 element and content files representing that div, be they text, image,                                 audio, or video files. An area element can link a div to a point                                 within a file, to a one-dimension segment of a file (e.g., text screen,                                 image line, audio/video clip), or a two-dimensional section of a file                                 (e.g, subsection of an image, or a subsection of the video display                                 of a video file. The area element has no content, and the following                                 attributes:                                 1. ID: an XML ID;                                 2. FILE: an IDREF to the file element being pointed to by the div;                                 3. SHAPE: a text string defining the shape of a two-dimensional                                 area being referenced in a link file;                                 4. COORDS: a text string representing a set of visual coordinates                                 within an image (still image or video frame). The COORDS and                                 SHAPE attributes should be used as in HTML 4;                                 5. BEGIN: a beginning location in a referenced file;                                 6. END: an ending location in a referenced file;                                 7. BETYPE: the syntax used in specifying the BEGIN and END                                 attributes (byte offset, IDREF value, or SMPTE time code);                                 8. EXTENT: the duraction of the segment; and                                 9. EXTTYPE: the syntax used in specifying the extent (byte length                                 or SMPTE time value).                         </xsd:documentation>                 </xsd:annotation>                 <xsd:attribute name="ID" type="xsd:ID" use="optional"/>                 <xsd:attribute name="FILE" type="xsd:IDREF" use="required"/>                 <xsd:attribute name="SHAPE" use="optional">                         <xsd:simpleType>                                 <xsd:restriction base="xsd:string">                                         <xsd:enumeration value="rect"/>                                         <xsd:enumeration value="circle"/>                                         <xsd:enumeration value="poly"/>                                 </xsd:restriction>                         </xsd:simpleType>                 </xsd:attribute>                 <xsd:attribute name="COORDS" type="xsd:string" use="optional"/>                 <xsd:attribute name="BEGIN" type="xsd:string" use="optional"/>                 <xsd:attribute name="END" type="xsd:string" use="optional"/>                 <xsd:attribute name="BETYPE" use="optional">                         <xsd:simpleType>                                 <xsd:restriction base="xsd:string">                                         <xsd:enumeration value="BYTE"/>                                         <xsd:enumeration value="IDREF"/>                                         <xsd:enumeration value="SMPTE"/>                                 </xsd:restriction>                         </xsd:simpleType>                 </xsd:attribute>                 <xsd:attribute name="EXTENT" type="xsd:string" use="optional"/>                 <xsd:attribute name="EXTTYPE" use="optional">                         <xsd:simpleType>                                 <xsd:restriction base="xsd:string">                                         <xsd:enumeration value="BYTE"/>                                         <xsd:enumeration value="SMPTE"/>                                 </xsd:restriction>                         </xsd:simpleType>                 </xsd:attribute>         </xsd:complexType>         <xsd:complexType name="mdSecType">                 <xsd:annotation>                         <xsd:documentation>mdSec (metadata section) Complex Type</xsd:documentation>                 </xsd:annotation>                 <xsd:sequence>                         <xsd:element name="mdRef" minOccurs="0" maxOccurs="unbounded">                                 <xsd:annotation>                                         <xsd:documentation>mdRef: metadata reference.                                                 The mdRef element is a generic element used throughout the METS schema                                                 to provide a pointer to metadata which resides outside the METS document.                                                 It has the following attributes:                                                 1. ID: an XML ID;                                                 2. LOCTYPE: the type of locator contained in the body of the element;                                                 3. MIMETYPE: the MIME type for the metadata being pointed at;                                                 4. MDType: the type of metadata being pointed at (e.g., MARC, EAD, etc.);                                                 5. LABEL: a label to display to the viewer of the METS document identifying the metadata; and                                                 6. XPTR: an xptr to a location within the file pointed to by the mdRef element, if applicable. </xsd:documentation>                                 </xsd:annotation>                                 <xsd:complexType>                                         <xsd:simpleContent>                                                 <xsd:extension base="xsd:string">                                                         <xsd:attribute name="ID" type="xsd:ID" use="required"/>                                                         <xsd:attribute name="LOCTYPE" use="required">                                                                 <xsd:simpleType>                                                                         <xsd:restriction base="xsd:string">                                                                                 <xsd:enumeration value="URN"/>                                                                                 <xsd:enumeration value="URL"/>                                                                                 <xsd:enumeration value="PURL"/>                                                                                 <xsd:enumeration value="HANDLE"/>                                                                                 <xsd:enumeration value="DOI"/>                                                                                 <xsd:enumeration value="PDI"/>                                                                                 <xsd:enumeration value="OTHER"/>                                                                         </xsd:restriction>                                                                 </xsd:simpleType>                                                         </xsd:attribute>                                                         <xsd:attribute name="MIMETYPE" type="xsd:string" use="optional"/>                                                         <xsd:attribute name="MDTYPE" use="required">                                                                 <xsd:simpleType>                                                                         <xsd:restriction base="xsd:string">                                                                                 <xsd:enumeration value="MARC"/>                                                                                 <xsd:enumeration value="EAD"/>                                                                                 <xsd:enumeration value="VRA"/>                                                                                 <xsd:enumeration value="DC"/>                                                                                 <xsd:enumeration value="NISOIMG"/>                                                                                 <xsd:enumeration value="LC-AV"/>                                                                                 <xsd:enumeration value="VRA"/>                                                                                 <xsd:enumeration value="TEIHDR"/>                                                                                 <xsd:enumeration value="OTHER"/>                                                                         </xsd:restriction>                                                                 </xsd:simpleType>                                                         </xsd:attribute>                                                         <xsd:attribute name="LABEL" type="xsd:string" use="optional"/>                                                         <xsd:attribute name="XPTR" type="xsd:string" use="optional"/>                                                 </xsd:extension>                                         </xsd:simpleContent>                                 </xsd:complexType>                         </xsd:element>                         <xsd:element name="mdWrap" minOccurs="0" maxOccurs="unbounded">                                 <xsd:annotation>                                         <xsd:documentation>mdWrap: metadata wrapper.                                                 The mdWrap element is a generic element used throughout the METS schema to allow                                                 the encoder to place arbitrary metadata conforming to other standards/schema within a                                                 METS document. The included metadata can either be encoded in XML, in which case                                                 it may be placed directly within the mdWrap element, or it can be Base64 encoded, and                                                 placed within a subsidiary binData element.                                         </xsd:documentation>                                 </xsd:annotation>                                 <xsd:complexType>                                         <xsd:choice>                                                 <xsd:element name="binData" type="xsd:binary" minOccurs="0">                                                         <xsd:annotation>                                                                 <xsd:documentation>A wrapper to contain Base64 encoded metadata. </xsd:documentation>                                                         </xsd:annotation>                                                 </xsd:element>                                                 <xsd:any namespace="##any"/>                                         </xsd:choice>                                         <xsd:attribute name="ID" type="xsd:ID" use="required"/>                                         <xsd:attribute name="MIMETYPE" type="xsd:string" use="optional"/>                                         <xsd:attribute name="MDTYPE" use="optional">                                                 <xsd:simpleType>                                                         <xsd:restriction base="xsd:string">                                                                 <xsd:enumeration value="MARC"/>                                                                 <xsd:enumeration value="EAD"/>                                                                 <xsd:enumeration value="VRA"/>                                                                 <xsd:enumeration value="DC"/>                                                                 <xsd:enumeration value="NISOIMG"/>                                                                 <xsd:enumeration value="LC-AV"/>                                                                 <xsd:enumeration value="VRA"/>                                                                 <xsd:enumeration value="TEIHDR"/>                                                                 <xsd:enumeration value="OTHER"/>                                                         </xsd:restriction>                                                 </xsd:simpleType>                                         </xsd:attribute>                                         <xsd:attribute name="LABEL" type="xsd:string" use="optional"/>                                 </xsd:complexType>                         </xsd:element>                 </xsd:sequence>                 <xsd:attribute name="ID" type="xsd:ID" use="optional"/>         </xsd:complexType> </xsd:schema>
Jerome McDonough [log in to unmask] Digital Library Development Team Leader Elmer Holmes Bobst Library, New York University 70 Washington Square South New York, NY 10012 (212) 998-2425

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