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IPTC Information Interchange Model - Wikipedia
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searchaux" style="display:none">Metadata format used in digital files</div> <p>The <b>Information Interchange Model</b> (<b>IIM</b>) is a file structure and set of <a href="/wiki/Metadata" title="Metadata">metadata</a> attributes that can be applied to text, <a href="/wiki/Image" title="Image">images</a> and other media types. It was developed in the early 1990s by the <a href="/wiki/International_Press_Telecommunications_Council" title="International Press Telecommunications Council">International Press Telecommunications Council</a> (IPTC) to expedite the international exchange of news among newspapers and news agencies. </p><p>The full IIM specification includes a complex data structure and a set of metadata definitions. A<span class="nowrap"> </span>new version of the user guide was released in May<span class="nowrap"> </span>2024.<sup id="cite_ref-iptc-photo-data-working-group-mar-2024_1-0" class="reference"><a href="#cite_note-iptc-photo-data-working-group-mar-2024-1"><span class="cite-bracket">[</span>1<span class="cite-bracket">]</span></a></sup> </p><p>Although IIM was intended for use with all types of news items — including simple text articles — a subset found broad worldwide acceptance as the standard embedded metadata used by news and commercial photographers. Information such as the name of the photographer, copyright information and the caption or other description can be embedded either manually or automatically. </p><p>IIM metadata embedded in images are often referred to as "IPTC headers", and can be easily encoded and decoded by most popular photo editing software. </p><p>The <a href="/wiki/Extensible_Metadata_Platform" title="Extensible Metadata Platform">Extensible Metadata Platform</a> (XMP) has largely superseded IIM's file structure, but the IIM image attributes are defined in the <i>IPTC Core</i> <a href="/wiki/XML_schema" title="XML schema">schema</a> for XMP and most image manipulation programs keep the XMP and non-XMP IPTC attributes synchronized. </p><p>Because of its nearly universal acceptance among photographers — even amateurs — this is by far IPTC's most widely used standard. On the other hand, the use of IIM structure and metadata for text and graphics is mainly limited to European news agencies. </p> <meta property="mw:PageProp/toc" /> <div class="mw-heading mw-heading2"><h2 id="Overview">Overview</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=IPTC_Information_Interchange_Model&action=edit&section=1" title="Edit section: Overview"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>IIM attributes are widely used and supported by many image creation and manipulation programs. Almost all the IIM attributes are supported by the <a href="/wiki/Exchangeable_image_file_format" class="mw-redirect" title="Exchangeable image file format">Exchangeable image file format</a> (Exif), a specification for the image <a href="/wiki/File_format" title="File format">file format</a> used by <a href="/wiki/Digital_camera" title="Digital camera">digital cameras</a>. </p><p>IIM metadata can be embedded into <a href="/wiki/JPEG" title="JPEG">JPEG</a>/<a href="/wiki/Exif" title="Exif">Exif</a>, <a href="/wiki/TIFF" title="TIFF">TIFF</a>, <a href="/wiki/JPEG2000" class="mw-redirect" title="JPEG2000">JPEG2000</a> or <a href="/wiki/Portable_Network_Graphics" class="mw-redirect" title="Portable Network Graphics">Portable Network Graphics</a> formatted image files. Other file formats such as <a href="/wiki/GIF" title="GIF">GIF</a> or <a href="/wiki/PCX" title="PCX">PCX</a> do not support IIM. </p><p>IIM's file structure technology has largely been overtaken by the <a href="/wiki/Extensible_Metadata_Platform" title="Extensible Metadata Platform">Extensible Metadata Platform</a> (XMP), but the IIM attribute definitions are the basis for the <i>IPTC Core</i> <a href="/wiki/XML_schema" title="XML schema">schema</a> for XMP. </p> <div class="mw-heading mw-heading2"><h2 id="History">History</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=IPTC_Information_Interchange_Model&action=edit&section=2" title="Edit section: History"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>Since the late 1970s the IPTC’s activities have primarily focused on developing and publishing industry standards for the interchange of news. The first standard, <a href="/wiki/IPTC_7901" title="IPTC 7901">IPTC 7901</a>, bridged the eras of <a href="/wiki/Teleprinter" title="Teleprinter">teleprinters</a> and computers. </p><p>In the late 1980s development began on a standard (the <i>Information Interchange Model</i>) that would be designed to best work with computerized news editing systems. </p><p>In particular, the IPTC defined a set of IIM <a href="/wiki/Metadata" title="Metadata">metadata</a> attributes that can be applied to images. These were defined originally in 1979, and revised significantly in 1991 to be part of the IIM, but the concept really advanced in 1994 when <a href="/wiki/Adobe_Systems" class="mw-redirect" title="Adobe Systems">Adobe Systems</a> defined a specification for actually embedding the metadata into digital image files — yielding "IPTC headers." </p><p>(Adobe adopted the IPTC IIM <a href="/wiki/Metadata" title="Metadata">metadata</a> definitions, but not the overall IIM data structure. Photos that contain IPTC Headers appear in all other respects to be normal JPEG or TIFF images; software that does not recognize IPTC Headers will simply ignore the <a href="/wiki/Metadata" title="Metadata">metadata</a>.) </p><p>In 2001, Adobe introduced "<a href="/wiki/Extensible_Metadata_Platform" title="Extensible Metadata Platform">Extensible Metadata Platform</a>" (XMP), which is an <a href="/wiki/XML" title="XML">XML</a> schema for the same types of <a href="/wiki/Metadata" title="Metadata">metadata</a> as IPTC, but is based on XML/<a href="/wiki/RDF_Schema" title="RDF Schema">RDF</a>, and is therefore inherently extensible. The effort spawned a collaboration with the IPTC, eventually producing the "IPTC Core Schema for XMP", which merges the two approaches to embedded metadata. The XMP specification describes techniques for embedding metadata in JPEG, TIFF, <a href="/wiki/JPEG2000" class="mw-redirect" title="JPEG2000">JPEG2000</a>, <a href="/wiki/GIF" title="GIF">GIF</a>, <a href="/wiki/Portable_Network_Graphics" class="mw-redirect" title="Portable Network Graphics">PNG</a>, <a href="/wiki/HTML" title="HTML">HTML</a>, <a href="/wiki/PostScript" title="PostScript">PostScript</a>, <a href="/wiki/PDF" title="PDF">PDF</a>, <a href="/wiki/Scalable_Vector_Graphics" class="mw-redirect" title="Scalable Vector Graphics">SVG</a>, Adobe Illustrator, and <a href="/wiki/Digital_Negative_Specification" class="mw-redirect" title="Digital Negative Specification">DNG</a> files. Recent versions of all the main Adobe software products, (Photoshop, Illustrator, Acrobat, Framemaker, etc.) support XMP, as do an increasing number of third-party tools. </p><p>In June 2007, IPTC in cooperation with <a href="/wiki/IFRA_(publishing)" class="mw-redirect" title="IFRA (publishing)">IFRA</a> held the First International Photo Metadata conference, titled "Working towards a seamless photo workflow" to a standing room only crowd (over 130 attendees), prior to the CEPIC Congress, in Florence, Italy. A similar conference was held in Malta in June 2008. </p><p>The IPTC Photo Metadata working group released a white paper,<sup id="cite_ref-2" class="reference"><a href="#cite_note-2"><span class="cite-bracket">[</span>2<span class="cite-bracket">]</span></a></sup> which figured prominently at this event. The conference keynote was given by Andreas Trampe, head of the photo desk of <i><a href="/wiki/Stern_(magazine)" title="Stern (magazine)">Stern</a></i>. Other speakers included photographers such as David Riecks and Peter Krogh, photo and news agencies such as <a href="/wiki/Reuters" title="Reuters">Reuters</a>; representatives of standards bodies such as PLUS, IPTC, and IFRA; as well as spokespersons from the photo metadata implementers side, such as <a href="/wiki/Adobe_Systems" class="mw-redirect" title="Adobe Systems">Adobe Systems</a>, <a href="/wiki/Apple_Inc." title="Apple Inc.">Apple Inc.</a>, <a href="/wiki/Canon_(company)" class="mw-redirect" title="Canon (company)">Canon Inc.</a>, <a href="/w/index.php?title=FotoWare_AS&action=edit&redlink=1" class="new" title="FotoWare AS (page does not exist)">FotoWare AS</a>, <a href="/wiki/Hasselblad" title="Hasselblad">Hasselblad</a>, and <a href="/wiki/Microsoft" title="Microsoft">Microsoft</a>. </p><p>The electronic presentations given by most of the speakers are available online from the <a rel="nofollow" class="external text" href="http://www.phmdc.org/">Photo Metadata Conference website</a> <a rel="nofollow" class="external text" href="https://web.archive.org/web/20110511225841/http://www.phmdc.org/">Archived</a> 2011-05-11 at the <a href="/wiki/Wayback_Machine" title="Wayback Machine">Wayback Machine</a> including a link to a report on each of the speakers' talks </p> <div class="mw-heading mw-heading2"><h2 id="See_also">See also</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=IPTC_Information_Interchange_Model&action=edit&section=3" title="Edit section: See also"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <p><a href="/wiki/ExifTool" title="ExifTool">ExifTool</a> – an open-source program for reading, writing, and manipulating image, audio, video, and PDF metadata </p> <div class="mw-heading mw-heading2"><h2 id="External_links">External links</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=IPTC_Information_Interchange_Model&action=edit&section=4" title="Edit section: External links"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <ul><li><a rel="nofollow" class="external text" href="https://iptc.org/standards/iim/">Information Interchange Model (IIM)</a> International Press Telecommunications Council (IPTC)</li> <li><a rel="nofollow" class="external text" href="https://www.logipole.com">Metadata++</a> — Metadata++ free <a href="/wiki/Microsoft_Windows" title="Microsoft Windows">Microsoft Windows</a> software to display and modify all kind of metadata</li></ul> <div class="mw-heading mw-heading2"><h2 id="References">References</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=IPTC_Information_Interchange_Model&action=edit&section=5" title="Edit section: References"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <style data-mw-deduplicate="TemplateStyles:r1239543626">.mw-parser-output .reflist{margin-bottom:0.5em;list-style-type:decimal}@media screen{.mw-parser-output .reflist{font-size:90%}}.mw-parser-output .reflist .references{font-size:100%;margin-bottom:0;list-style-type:inherit}.mw-parser-output .reflist-columns-2{column-width:30em}.mw-parser-output .reflist-columns-3{column-width:25em}.mw-parser-output .reflist-columns{margin-top:0.3em}.mw-parser-output .reflist-columns ol{margin-top:0}.mw-parser-output .reflist-columns li{page-break-inside:avoid;break-inside:avoid-column}.mw-parser-output .reflist-upper-alpha{list-style-type:upper-alpha}.mw-parser-output .reflist-upper-roman{list-style-type:upper-roman}.mw-parser-output .reflist-lower-alpha{list-style-type:lower-alpha}.mw-parser-output .reflist-lower-greek{list-style-type:lower-greek}.mw-parser-output .reflist-lower-roman{list-style-type:lower-roman}</style><div class="reflist"> <div class="mw-references-wrap"><ol class="references"> <li id="cite_note-iptc-photo-data-working-group-mar-2024-1"><span class="mw-cite-backlink"><b><a href="#cite_ref-iptc-photo-data-working-group-mar-2024_1-0">^</a></b></span> <span class="reference-text"> <style data-mw-deduplicate="TemplateStyles:r1238218222">.mw-parser-output cite.citation{font-style:inherit;word-wrap:break-word}.mw-parser-output .citation q{quotes:"\"""\"""'""'"}.mw-parser-output .citation:target{background-color:rgba(0,127,255,0.133)}.mw-parser-output .id-lock-free.id-lock-free a{background:url("//upload.wikimedia.org/wikipedia/commons/6/65/Lock-green.svg")right 0.1em center/9px no-repeat}.mw-parser-output .id-lock-limited.id-lock-limited a,.mw-parser-output .id-lock-registration.id-lock-registration a{background:url("//upload.wikimedia.org/wikipedia/commons/d/d6/Lock-gray-alt-2.svg")right 0.1em center/9px no-repeat}.mw-parser-output .id-lock-subscription.id-lock-subscription a{background:url("//upload.wikimedia.org/wikipedia/commons/a/aa/Lock-red-alt-2.svg")right 0.1em center/9px no-repeat}.mw-parser-output .cs1-ws-icon a{background:url("//upload.wikimedia.org/wikipedia/commons/4/4c/Wikisource-logo.svg")right 0.1em center/12px no-repeat}body:not(.skin-timeless):not(.skin-minerva) .mw-parser-output .id-lock-free a,body:not(.skin-timeless):not(.skin-minerva) .mw-parser-output .id-lock-limited a,body:not(.skin-timeless):not(.skin-minerva) .mw-parser-output .id-lock-registration a,body:not(.skin-timeless):not(.skin-minerva) .mw-parser-output .id-lock-subscription a,body:not(.skin-timeless):not(.skin-minerva) .mw-parser-output .cs1-ws-icon a{background-size:contain;padding:0 1em 0 0}.mw-parser-output .cs1-code{color:inherit;background:inherit;border:none;padding:inherit}.mw-parser-output .cs1-hidden-error{display:none;color:var(--color-error,#d33)}.mw-parser-output .cs1-visible-error{color:var(--color-error,#d33)}.mw-parser-output .cs1-maint{display:none;color:#085;margin-left:0.3em}.mw-parser-output .cs1-kern-left{padding-left:0.2em}.mw-parser-output .cs1-kern-right{padding-right:0.2em}.mw-parser-output .citation .mw-selflink{font-weight:inherit}@media screen{.mw-parser-output .cs1-format{font-size:95%}html.skin-theme-clientpref-night .mw-parser-output .cs1-maint{color:#18911f}}@media screen and (prefers-color-scheme:dark){html.skin-theme-clientpref-os .mw-parser-output .cs1-maint{color:#18911f}}</style><cite id="CITEREFAnon2024" class="citation web cs1">Anon (22 March 2024). <a rel="nofollow" class="external text" href="https://www.iptc.org/std/photometadata/documentation/userguide/">"IPTC Photo Metadata user guide"</a>. <i>IPTC Photo Metadata Working Group</i>. London, United Kingdom<span class="reference-accessdate">. Retrieved <span class="nowrap">2024-06-11</span></span>.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.genre=unknown&rft.jtitle=IPTC+Photo+Metadata+Working+Group&rft.atitle=IPTC+Photo+Metadata+user+guide&rft.date=2024-03-22&rft.au=Anon&rft_id=https%3A%2F%2Fwww.iptc.org%2Fstd%2Fphotometadata%2Fdocumentation%2Fuserguide%2F&rfr_id=info%3Asid%2Fen.wikipedia.org%3AIPTC+Information+Interchange+Model" class="Z3988"></span></span> </li> <li id="cite_note-2"><span class="mw-cite-backlink"><b><a href="#cite_ref-2">^</a></b></span> <span class="reference-text"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><cite id="CITEREFLöffler2007" class="citation cs2">Löffler, Harald (2007), Baranger, Walt; Steidl, Michael (eds.), <a rel="nofollow" class="external text" href="http://www.iptc.org/goto?phmdwp2007"><i>Photo Metadata White Paper 2007</i></a>, IPTC</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&rft.genre=book&rft.btitle=Photo+Metadata+White+Paper+2007&rft.pub=IPTC&rft.date=2007&rft.aulast=L%C3%B6ffler&rft.aufirst=Harald&rft_id=http%3A%2F%2Fwww.iptc.org%2Fgoto%3Fphmdwp2007&rfr_id=info%3Asid%2Fen.wikipedia.org%3AIPTC+Information+Interchange+Model" class="Z3988"></span>. The white paper discusses upcoming changes to the IPTC Photo Metadata Standards</span> </li> </ol></div></div> <!-- NewPP limit report Parsed by mw‐web.eqiad.main‐5dc468848‐k4xtt Cached time: 20241122144358 Cache expiry: 2592000 Reduced expiry: false Complications: [vary‐revision‐sha1, show‐toc] CPU time usage: 0.138 seconds Real time usage: 0.329 seconds Preprocessor visited node count: 391/1000000 Post‐expand include size: 4627/2097152 bytes Template argument size: 560/2097152 bytes Highest expansion depth: 8/100 Expensive parser function count: 1/500 Unstrip recursion depth: 1/20 Unstrip post‐expand size: 7804/5000000 bytes Lua time usage: 0.079/10.000 seconds Lua memory usage: 3537910/52428800 bytes Number of Wikibase entities loaded: 0/400 --> <!-- Transclusion expansion time report (%,ms,calls,template) 100.00% 311.991 1 -total 48.74% 152.068 1 Template:Short_description 37.07% 115.657 1 Template:Reflist 28.34% 88.407 1 Template:Cite_web 25.64% 79.990 2 Template:Pagetype 13.72% 42.806 3 Template:Main_other 11.65% 36.334 1 Template:SDcat 7.25% 22.621 1 Template:Webarchive 4.08% 12.736 2 Template:Nbsp 2.48% 7.729 1 Template:Short_description/lowercasecheck --> <!-- Saved in parser cache with key enwiki:pcache:idhash:17188838-0!canonical and timestamp 20241122144358 and revision id 1237097820. 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