Under Construction I traced the files created when borrowing an e-Book from my library using the overdrive software on the Library site.
Where are the files:       
   Windows: C:\users\[std usr]\my documents\my digital editions\xxx.epub
   
       Mac: ~/Documents/Digital Editions/The_Social_Media_Survival_Guide.epub
            ~/Downloads/TheSocialMediaSurvivalGuide.ascm
            ~ = your folder under /Users
 
epub books downloaded with the overdrive system create ASCM (Adobe Content Server Message File) Library books in EPUB format downloaded to a mac or windows computer have a file type of ASCM (Adobe Content Server Message File) which in uses Resource Description Framework (RDF) and Dublin Core® Metadata Initiative (DCMI) files developed for the Online Computer Library Center (OCLC). See web 3.0
Apparently this system is used to manage expiration dates, Digital Rights Management (DRM), expiration and other things associated with the e-Book borrowing process from overdrive.
~/Downloads/TheSocialMediaSurvivalGuide.ascm

<fulfillmentToken fulfillmentType="loan" auth="user" xmlns="http://ns.adobe.com/adept">
  <distributor>urn:uuid:f1227b83-f91b-4f30-9ae2-0f65ffeea9ac</distributor>
  <operatorURL>http://acsepub.contentreserve.com/fulfillment</operatorURL>
  <transaction>Somerset~084-460185-00003_27BDFBC1-239B-4E7F-B3C5-0DEDC9F02F8D-410</transaction>
  <expiration>2012-04-25T20:59:02-04:00</expiration>
  <resourceItemInfo>
    <resource>urn:uuid:1ec06933-9c2b-4428-8152-eb05cc5e737e</resource>
    <resourceItem>1</resourceItem>
    <metadata>
      <dc:title xmlns:dc="http://purl.org/dc/elements/1.1/">The Social Media Survival Guide</dc:title>
      <dc:creator xmlns:dc="http://purl.org/dc/elements/1.1/">Deltina Hay</dc:creator>
      <dc:publisher xmlns:dc="http://purl.org/dc/elements/1.1/">Linden Publishing</dc:publisher>
      <dc:identifier xmlns:dc="http://purl.org/dc/elements/1.1/">978-1-61035-017-4</dc:identifier>
      <dc:format xmlns:dc="http://purl.org/dc/elements/1.1/">application/epub+zip</dc:format>
      <dc:language xmlns:dc="http://purl.org/dc/elements/1.1/">en-US</dc:language>
      <thumbnailURL>http://images.contentreserve.com/ImageType-200/0427-1/{27BDFBC1-239B-4E7F-B3C5-0DEDC9F02F8D}Img200.jpg</thumbnailURL>
    </metadata>
    <licenseToken>
      <resource>urn:uuid:1ec06933-9c2b-4428-8152-eb05cc5e737e</resource>
      <permissions>
        <display>
          <duration>1208075</duration>
        </display>
        <excerpt>
          <duration>1208075</duration>
        </excerpt>
        <print>
          <duration>1208075</duration>
        </print>
        <play>
          <duration>1208075</duration>
        </play>
      </permissions>
    </licenseToken>
  </resourceItemInfo>
  <hmac>VDBKP5qgbwSzYD1+SINkGXywqx8=</hmac>
</fulfillmentToken>


http://purl.org/dc/elements/1.1/ downloads the following file: purl (Persistent Uniform Resource Locators) are Web addresses that act as permanent identifiers which redirect to changing web addresses. dcelements.rdf which is readable in SeaMonkey <rdf:RDF> -<rdf:Description rdf:about="http://purl.org/dc/elements/1.1/"> <dcterms:title xml:lang="en-US">Dublin Core Metadata Element Set, Version 1.1</dcterms:title> <dcterms:publisher rdf:resource="http://purl.org/dc/aboutdcmi#DCMI"/> <dcterms:modified>2010-10-11</dcterms:modified> </rdf:Description> -<rdf:Property rdf:about="http://purl.org/dc/elements/1.1/title"> <rdfs:label xml:lang="en-US">Title</rdfs:label> <rdfs:comment xml:lang="en-US">A name given to the resource.</rdfs:comment> <rdfs:isDefinedBy rdf:resource="http://purl.org/dc/elements/1.1/"/> <dcterms:issued>1999-07-02</dcterms:issued> <dcterms:modified>2008-01-14</dcterms:modified> <rdf:type rdf:resource="http://www.w3.org/1999/02/22-rdf-syntax-ns#Property"/> <dcterms:hasVersion rdf:resource="http://dublincore.org/usage/terms/history/#title-006"/> -<skos:note xml:lang="en-US"> A second property with the same name as this property has been declared in the dcterms: namespace (purl.org/dc/terms/). See the Introduction to the document "DCMI Metadata Terms" (dublincore.org/documents/dcmi-terms/) for an explanation. </skos:note> </rdf:Property> -<rdf:Property rdf:about="http://purl.org/dc/elements/1.1/creator"> <rdfs:label xml:lang="en-US">Creator</rdfs:label> -<rdfs:comment xml:lang="en-US"> An entity primarily responsible for making the resource. </rdfs:comment> -<dcterms:description xml:lang="en-US"> Examples of a Creator include a person, an organization, or a service. Typically, the name of a Creator should be used to indicate the entity. </dcterms:description> <rdfs:isDefinedBy rdf:resource="http://purl.org/dc/elements/1.1/"/> <dcterms:issued>1999-07-02</dcterms:issued> <dcterms:modified>2008-01-14</dcterms:modified> <rdf:type rdf:resource="http://www.w3.org/1999/02/22-rdf-syntax-ns#Property"/> <dcterms:hasVersion rdf:resource="http://dublincore.org/usage/terms/history/#creator-006"/> -<skos:note xml:lang="en-US"> A second property with the same name as this property has been declared in the dcterms: namespace (http://purl.org/dc/terms/). See the Introduction to the document "DCMI Metadata Terms" (http://dublincore.org/documents/dcmi-terms/) for an explanation. </skos:note> </rdf:Property> -<rdf:Property rdf:about="http://purl.org/dc/elements/1.1/subject"> <rdfs:label xml:lang="en-US">Subject</rdfs:label> <rdfs:comment xml:lang="en-US">The topic of the resource.</rdfs:comment> -<dcterms:description xml:lang="en-US"> Typically, the subject will be represented using keywords, key phrases, or classification codes. Recommended best practice is to use a controlled vocabulary. To describe the spatial or temporal topic of the resource, use the Coverage element. </dcterms:description> <rdfs:isDefinedBy rdf:resource="http://purl.org/dc/elements/1.1/"/> <dcterms:issued>1999-07-02</dcterms:issued> <dcterms:modified>2008-01-14</dcterms:modified> <rdf:type rdf:resource="http://www.w3.org/1999/02/22-rdf-syntax-ns#Property"/> <dcterms:hasVersion rdf:resource="http://dublincore.org/usage/terms/history/#subject-006"/> -<skos:note xml:lang="en-US"> A second property with the same name as this property has been declared in the dcterms: namespace (http://purl.org/dc/terms/). See the Introduction to the document "DCMI Metadata Terms" (http://dublincore.org/documents/dcmi-terms/) for an explanation. </skos:note> </rdf:Property> -<rdf:Property rdf:about="http://purl.org/dc/elements/1.1/description"> <rdfs:label xml:lang="en-US">Description</rdfs:label> <rdfs:comment xml:lang="en-US">An account of the resource.</rdfs:comment> -<dcterms:description xml:lang="en-US"> Description may include but is not limited to: an abstract, a table of contents, a graphical representation, or a free-text account of the resource. </dcterms:description> <rdfs:isDefinedBy rdf:resource="http://purl.org/dc/elements/1.1/"/> <dcterms:issued>1999-07-02</dcterms:issued> <dcterms:modified>2008-01-14</dcterms:modified> <rdf:type rdf:resource="http://www.w3.org/1999/02/22-rdf-syntax-ns#Property"/> <dcterms:hasVersion rdf:resource="http://dublincore.org/usage/terms/history/#description-006"/> -<skos:note xml:lang="en-US"> A second property with the same name as this property has been declared in the dcterms: namespace (http://purl.org/dc/terms/). See the Introduction to the document "DCMI Metadata Terms" (http://dublincore.org/documents/dcmi-terms/) for an explanation. </skos:note> </rdf:Property> -<rdf:Property rdf:about="http://purl.org/dc/elements/1.1/publisher"> <rdfs:label xml:lang="en-US">Publisher</rdfs:label> -<rdfs:comment xml:lang="en-US"> An entity responsible for making the resource available. </rdfs:comment> -<dcterms:description xml:lang="en-US"> Examples of a Publisher include a person, an organization, or a service. Typically, the name of a Publisher should be used to indicate the entity. </dcterms:description> <rdfs:isDefinedBy rdf:resource="http://purl.org/dc/elements/1.1/"/> <dcterms:issued>1999-07-02</dcterms:issued> <dcterms:modified>2008-01-14</dcterms:modified> <rdf:type rdf:resource="http://www.w3.org/1999/02/22-rdf-syntax-ns#Property"/> <dcterms:hasVersion rdf:resource="http://dublincore.org/usage/terms/history/#publisher-006"/> -<skos:note xml:lang="en-US"> A second property with the same name as this property has been declared in the dcterms: namespace (http://purl.org/dc/terms/). See the Introduction to the document "DCMI Metadata Terms" (http://dublincore.org/documents/dcmi-terms/) for an explanation. </skos:note> </rdf:Property> -<rdf:Property rdf:about="http://purl.org/dc/elements/1.1/contributor"> <rdfs:label xml:lang="en-US">Contributor</rdfs:label> -<rdfs:comment xml:lang="en-US"> An entity responsible for making contributions to the resource. </rdfs:comment> -<dcterms:description xml:lang="en-US"> Examples of a Contributor include a person, an organization, or a service. Typically, the name of a Contributor should be used to indicate the entity. </dcterms:description> <rdfs:isDefinedBy rdf:resource="http://purl.org/dc/elements/1.1/"/> <dcterms:issued>1999-07-02</dcterms:issued> <dcterms:modified>2008-01-14</dcterms:modified> <rdf:type rdf:resource="http://www.w3.org/1999/02/22-rdf-syntax-ns#Property"/> <dcterms:hasVersion rdf:resource="http://dublincore.org/usage/terms/history/#contributor-006"/> -<skos:note xml:lang="en-US"> A second property with the same name as this property has been declared in the dcterms: namespace (http://purl.org/dc/terms/). See the Introduction to the document "DCMI Metadata Terms" (http://dublincore.org/documents/dcmi-terms/) for an explanation. </skos:note> </rdf:Property> -<rdf:Property rdf:about="http://purl.org/dc/elements/1.1/date"> <rdfs:label xml:lang="en-US">Date</rdfs:label> -<rdfs:comment xml:lang="en-US"> A point or period of time associated with an event in the lifecycle of the resource. </rdfs:comment> -<dcterms:description xml:lang="en-US"> Date may be used to express temporal information at any level of granularity. Recommended best practice is to use an encoding scheme, such as the W3CDTF profile of ISO 8601 [W3CDTF]. </dcterms:description> <rdfs:isDefinedBy rdf:resource="http://purl.org/dc/elements/1.1/"/> <dcterms:issued>1999-07-02</dcterms:issued> <dcterms:modified>2008-01-14</dcterms:modified> <rdf:type rdf:resource="http://www.w3.org/1999/02/22-rdf-syntax-ns#Property"/> <dcterms:hasVersion rdf:resource="http://dublincore.org/usage/terms/history/#date-006"/> -<skos:note xml:lang="en-US"> A second property with the same name as this property has been declared in the dcterms: namespace (http://purl.org/dc/terms/). See the Introduction to the document "DCMI Metadata Terms" (http://dublincore.org/documents/dcmi-terms/) for an explanation. </skos:note> </rdf:Property> -<rdf:Property rdf:about="http://purl.org/dc/elements/1.1/type"> <rdfs:label xml:lang="en-US">Type</rdfs:label> <rdfs:comment xml:lang="en-US">The nature or genre of the resource.</rdfs:comment> -<dcterms:description xml:lang="en-US"> Recommended best practice is to use a controlled vocabulary such as the DCMI Type Vocabulary [DCMITYPE]. To describe the file format, physical medium, or dimensions of the resource, use the Format element. </dcterms:description> <rdfs:isDefinedBy rdf:resource="http://purl.org/dc/elements/1.1/"/> <dcterms:issued>1999-07-02</dcterms:issued> <dcterms:modified>2008-01-14</dcterms:modified> <rdf:type rdf:resource="http://www.w3.org/1999/02/22-rdf-syntax-ns#Property"/> <dcterms:hasVersion rdf:resource="http://dublincore.org/usage/terms/history/#type-006"/> -<skos:note xml:lang="en-US"> A second property with the same name as this property has been declared in the dcterms: namespace (http://purl.org/dc/terms/). See the Introduction to the document "DCMI Metadata Terms" (http://dublincore.org/documents/dcmi-terms/) for an explanation. </skos:note> </rdf:Property> -<rdf:Property rdf:about="http://purl.org/dc/elements/1.1/format"> <rdfs:label xml:lang="en-US">Format</rdfs:label> -<rdfs:comment xml:lang="en-US"> The file format, physical medium, or dimensions of the resource. </rdfs:comment> -<dcterms:description xml:lang="en-US"> Examples of dimensions include size and duration. Recommended best practice is to use a controlled vocabulary such as the list of Internet Media Types [MIME]. </dcterms:description> <rdfs:isDefinedBy rdf:resource="http://purl.org/dc/elements/1.1/"/> <dcterms:issued>1999-07-02</dcterms:issued> <dcterms:modified>2008-01-14</dcterms:modified> <rdf:type rdf:resource="http://www.w3.org/1999/02/22-rdf-syntax-ns#Property"/> <dcterms:hasVersion rdf:resource="http://dublincore.org/usage/terms/history/#format-007"/> -<skos:note xml:lang="en-US"> A second property with the same name as this property has been declared in the dcterms: namespace (http://purl.org/dc/terms/). See the Introduction to the document "DCMI Metadata Terms" (http://dublincore.org/documents/dcmi-terms/) for an explanation. </skos:note> </rdf:Property> -<rdf:Property rdf:about="http://purl.org/dc/elements/1.1/identifier"> <rdfs:label xml:lang="en-US">Identifier</rdfs:label> -<rdfs:comment xml:lang="en-US"> An unambiguous reference to the resource within a given context. </rdfs:comment> -<dcterms:description xml:lang="en-US"> Recommended best practice is to identify the resource by means of a string conforming to a formal identification system. </dcterms:description> <rdfs:isDefinedBy rdf:resource="http://purl.org/dc/elements/1.1/"/> <dcterms:issued>1999-07-02</dcterms:issued> <dcterms:modified>2008-01-14</dcterms:modified> <rdf:type rdf:resource="http://www.w3.org/1999/02/22-rdf-syntax-ns#Property"/> <dcterms:hasVersion rdf:resource="http://dublincore.org/usage/terms/history/#identifier-006"/> -<skos:note xml:lang="en-US"> A second property with the same name as this property has been declared in the dcterms: namespace (http://purl.org/dc/terms/). See the Introduction to the document "DCMI Metadata Terms" (http://dublincore.org/documents/dcmi-terms/) for an explanation. </skos:note> </rdf:Property> -<rdf:Property rdf:about="http://purl.org/dc/elements/1.1/source"> <rdfs:label xml:lang="en-US">Source</rdfs:label> -<rdfs:comment xml:lang="en-US"> A related resource from which the described resource is derived. </rdfs:comment> -<dcterms:description xml:lang="en-US"> The described resource may be derived from the related resource in whole or in part. Recommended best practice is to identify the related resource by means of a string conforming to a formal identification system. </dcterms:description> <rdfs:isDefinedBy rdf:resource="http://purl.org/dc/elements/1.1/"/> <dcterms:issued>1999-07-02</dcterms:issued> <dcterms:modified>2008-01-14</dcterms:modified> <rdf:type rdf:resource="http://www.w3.org/1999/02/22-rdf-syntax-ns#Property"/> <dcterms:hasVersion rdf:resource="http://dublincore.org/usage/terms/history/#source-006"/> -<skos:note xml:lang="en-US"> A second property with the same name as this property has been declared in the dcterms: namespace (http://purl.org/dc/terms/). See the Introduction to the document "DCMI Metadata Terms" (http://dublincore.org/documents/dcmi-terms/) for an explanation. </skos:note> </rdf:Property> -<rdf:Property rdf:about="http://purl.org/dc/elements/1.1/language"> <rdfs:label xml:lang="en-US">Language</rdfs:label> <rdfs:comment xml:lang="en-US">A language of the resource.</rdfs:comment> -<dcterms:description xml:lang="en-US"> Recommended best practice is to use a controlled vocabulary such as RFC 4646 [RFC4646]. </dcterms:description> <rdfs:isDefinedBy rdf:resource="http://purl.org/dc/elements/1.1/"/> <dcterms:issued>1999-07-02</dcterms:issued> <dcterms:modified>2008-01-14</dcterms:modified> <rdf:type rdf:resource="http://www.w3.org/1999/02/22-rdf-syntax-ns#Property"/> <dcterms:hasVersion rdf:resource="http://dublincore.org/usage/terms/history/#language-007"/> <rdfs:seeAlso rdf:resource="http://www.ietf.org/rfc/rfc4646.txt"/> -<skos:note xml:lang="en-US"> A second property with the same name as this property has been declared in the dcterms: namespace (http://purl.org/dc/terms/). See the Introduction to the document "DCMI Metadata Terms" (http://dublincore.org/documents/dcmi-terms/) for an explanation. </skos:note> </rdf:Property> -<rdf:Property rdf:about="http://purl.org/dc/elements/1.1/relation"> <rdfs:label xml:lang="en-US">Relation</rdfs:label> <rdfs:comment xml:lang="en-US">A related resource.</rdfs:comment> -<dcterms:description xml:lang="en-US"> Recommended best practice is to identify the related resource by means of a string conforming to a formal identification system. </dcterms:description> <rdfs:isDefinedBy rdf:resource="http://purl.org/dc/elements/1.1/"/> <dcterms:issued>1999-07-02</dcterms:issued> <dcterms:modified>2008-01-14</dcterms:modified> <rdf:type rdf:resource="http://www.w3.org/1999/02/22-rdf-syntax-ns#Property"/> <dcterms:hasVersion rdf:resource="http://dublincore.org/usage/terms/history/#relation-006"/> -<skos:note xml:lang="en-US"> A second property with the same name as this property has been declared in the dcterms: namespace (http://purl.org/dc/terms/). See the Introduction to the document "DCMI Metadata Terms" (http://dublincore.org/documents/dcmi-terms/) for an explanation. </skos:note> </rdf:Property> -<rdf:Property rdf:about="http://purl.org/dc/elements/1.1/coverage"> <rdfs:label xml:lang="en-US">Coverage</rdfs:label> -<rdfs:comment xml:lang="en-US"> The spatial or temporal topic of the resource, the spatial applicability of the resource, or the jurisdiction under which the resource is relevant. </rdfs:comment> -<dcterms:description xml:lang="en-US"> Spatial topic and spatial applicability may be a named place or a location specified by its geographic coordinates. Temporal topic may be a named period, date, or date range. A jurisdiction may be a named administrative entity or a geographic place to which the resource applies. Recommended best practice is to use a controlled vocabulary such as the Thesaurus of Geographic Names [TGN]. Where appropriate, named places or time periods can be used in preference to numeric identifiers such as sets of coordinates or date ranges. </dcterms:description> <rdfs:isDefinedBy rdf:resource="http://purl.org/dc/elements/1.1/"/> <dcterms:issued>1999-07-02</dcterms:issued> <dcterms:modified>2008-01-14</dcterms:modified> <rdf:type rdf:resource="http://www.w3.org/1999/02/22-rdf-syntax-ns#Property"/> <dcterms:hasVersion rdf:resource="http://dublincore.org/usage/terms/history/#coverage-006"/> -<skos:note xml:lang="en-US"> A second property with the same name as this property has been declared in the dcterms: namespace (http://purl.org/dc/terms/). See the Introduction to the document "DCMI Metadata Terms" (http://dublincore.org/documents/dcmi-terms/) for an explanation. </skos:note> </rdf:Property> -<rdf:Property rdf:about="http://purl.org/dc/elements/1.1/rights"> <rdfs:label xml:lang="en-US">Rights</rdfs:label> -<rdfs:comment xml:lang="en-US"> Information about rights held in and over the resource. </rdfs:comment> -<dcterms:description xml:lang="en-US"> Typically, rights information includes a statement about various property rights associated with the resource, including intellectual property rights. </dcterms:description> <rdfs:isDefinedBy rdf:resource="http://purl.org/dc/elements/1.1/"/> <dcterms:issued>1999-07-02</dcterms:issued> <dcterms:modified>2008-01-14</dcterms:modified> <rdf:type rdf:resource="http://www.w3.org/1999/02/22-rdf-syntax-ns#Property"/> <dcterms:hasVersion rdf:resource="http://dublincore.org/usage/terms/history/#rights-006"/> -<skos:note xml:lang="en-US"> A second property with the same name as this property has been declared in the dcterms: namespace (http://purl.org/dc/terms/). See the Introduction to the document "DCMI Metadata Terms" (http://dublincore.org/documents/dcmi-terms/) for an explanation. </skos:note> </rdf:Property> </rdf:RDF>

last updated 11 April 2010