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stpeter
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inbox/ft-metadata.xml
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161
inbox/ft-metadata.xml
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<?xml version='1.0' encoding='UTF-8'?>
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<!DOCTYPE xep SYSTEM 'xep.dtd' [
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<!ENTITY % ents SYSTEM 'xep.ent'>
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%ents;
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]>
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<?xml-stylesheet type='text/xsl' href='xep.xsl'?>
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<xep>
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<header>
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<title>File Transfer Metadata</title>
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<abstract>An extension to XEP-0096 and XEP-0234 to design a way of
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adding arbitrary data to file transfer offers.</abstract>
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&LEGALNOTICE;
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<number>xxxx</number>
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<status>ProtoXEP</status>
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<type>Standards Track</type>
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<approver>Council</approver>
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<sig>Standards</sig>
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<dependencies>
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<spec>XMPP Core</spec>
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<spec>XEP-0096</spec>
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<spec>XEP-0234</spec>
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</dependencies>
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<supersedes/>
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<supersededby/>
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<shortname>NOT YET ASSIGNED</shortname>
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<author>
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<firstname>Jonny</firstname>
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<surname>Lamb</surname>
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<email>jonny.lamb@collabora.co.uk</email>
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<jid>jonny.lamb@collabora.co.uk</jid>
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</author>
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<revision>
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<version>0.0.1</version>
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<date>2011-11-11</date>
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<initials>jl</initials>
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<remark>Initial version.</remark>
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</revision>
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</header>
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<section1 topic='Introduction' anchor='intro'>
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<p>The current methods for file transfers include basic metadata
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about the file being offered such as its name, size, and date. There
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currently is no way to provide arbitrary details about the file
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being transferred. <cite>XEP-0264</cite> starts to address this
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problem, but only includes thumbnails of transfers.</p>
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<p>The design of this extension to file transfer offers is
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influenced by adding data forms to disco#info replies (as per
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&xep0115;) and by the design of &xep0264;</p>
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</section1>
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<section1 topic='Requirements' anchor='requirements'>
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<p>This document defines a way to include arbitrary data in a file
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transfer.</p>
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</section1>
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<section1 topic='Use Case' anchor='usecase'>
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<p>The arbitrary data added to the offer is incluced in &xep0004;
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which must be formatted according to &xep0128; to the root
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<file> element. There can be as many data forms under said
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<file> element as long as the FORM_TYPE field is different for
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each form.</p>
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</section1>
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<section1 topic='Examples' anchor='examples'>
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<example caption='Inclusion of photo EXIF data in an SI file
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transfer offer'><![CDATA[
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<iq type='set' id='offer1' to='receiver@jabber.org/resource'>
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<si xmlns='http://jabber.org/protocol/si'
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id='a0'
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mime-type='image/jpeg'
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profile='http://jabber.org/protocol/si/profile/file-transfer'>
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<file xmlns='http://jabber.org/protocol/si/profile/file-transfer'
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name='thatwildparty.jpg'
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size='3240688'>
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<x xmlns='jabber:x:data' type='result'>
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<field var='FORM_TYPE' type='hidden'>
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<value>example:dataform:exifdata</value>
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</field>
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<field var='ImageWidth'>
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<value>3872</value>
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</field>
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<field var='ImageHeight'>
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<value>2592</value>
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</field>
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<field var='Make'>
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<value>NIKON CORPORATION</value>
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</field>
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<field var='Model'>
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<value>NIKON D80</value>
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</field>
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</x>
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</file>
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...
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</si>
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</iq>]]></example>
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<example caption='Inclusion of photo EXIF data in a Jingle file
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transfer offer'><![CDATA[
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<iq from='romeo@montague.lit/orchard'
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id='nzu25s8'
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to='juliet@capulet.lit/balcony'
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type='set'>
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<jingle xmlns='urn:xmpp:jingle:1'
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action='session-initiate'
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initiator='romeo@montague.lit/orchard'
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sid='851ba2'>
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<content creator='initiator' name='a-file-offer'>
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<description xmlns='urn:xmpp:jingle:apps:file-transfer:3'>
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<offer>
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<file>
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<date>1969-07-21T02:56:15Z</date>
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<desc>The wild party you should've been at</desc>
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<name>thatwildparty.jpg</name>
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<range/>
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<size>8492843</size>
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<hashes xmlns='urn:xmpp:hashes:0'>
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<hash algo='sha1'>552da749930852c69ae5d2141d3766b1</hash>
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</hashes>
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<x xmlns='jabber:x:data' type='result'>
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<field var='FORM_TYPE' type='hidden'>
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<value>example:dataform:exifdata</value>
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</field>
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<field var='ImageWidth'>
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<value>3872</value>
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</field>
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<field var='ImageHeight'>
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<value>2592</value>
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</field>
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<field var='Make'>
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<value>NIKON CORPORATION</value>
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</field>
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<field var='Model'>
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<value>NIKON D80</value>
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</field>
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</x>
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</file>
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</offer>
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</description>
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...
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</content>
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</jingle>
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</iq>]]></example>
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</section1>
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<section1 topic='Security Considerations' anchor='sec'>
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<p>This document introduces no security concerns above and beyond
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those specified in &xep0004;.</p>
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</section1>
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<section1 topic='IANA Considerations' anchor='iana'>
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<p>This document requires no interaction with &IANA;. </p>
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</section1>
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<section1 topic='XMPP Registrar Considerations' anchor='registrar'>
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<p>This document requires no interaction with the ®ISTRAR;;
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however, specifications following the best practices defined herein
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may register FORM_TYPEs and field values with the XMPP
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Registrar.</p>
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</section1>
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</xep>
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