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Text of the page (random words):
the open graph protocol the open graph protocol introduction the open graph protocol enables any web page to become a rich object in a social graph for instance this is used on facebook to allow any web page to have the same functionality as any other object on facebook while many different technologies and schemas exist and could be combined together there isn t a single technology which provides enough information to richly represent any web page within the social graph the open graph protocol builds on these existing technologies and gives developers one thing to implement developer simplicity is a key goal of the open graph protocol which has informed many of the technical design decisions basic metadata to turn your web pages into graph objects you need to add basic metadata to your page we ve based the initial version of the protocol on rdfa which means that you ll place additional meta tags in the head of your web page the four required properties for every page are og title the title of your object as it should appear within the graph e g the rock og type the type of your object e g video movie depending on the type you specify other properties may also be required og image an image url which should represent your object within the graph og url the canonical url of your object that will be used as its permanent id in the graph e g https www imdb com title tt0117500 as an example the following is the open graph protocol markup for the rock on imdb html prefix og https ogp me ns head title the rock 1996 title meta property og title content the rock meta property og type content video movie meta property og url content https www imdb com title tt0117500 meta property og image content https ia media imdb com images rock jpg head html optional metadata the following properties are optional for any object and are generally recommended og audio a url to an audio file to accompany this object og description a one to two sentence description of your object og determiner the word that appears before this object s title in a sentence an enum of a an the auto if auto is chosen the consumer of your data should choose between a or an default is blank og locale the locale these tags are marked up in of the format language_territory default is en_us og locale alternate an array of other locales this page is available in og site_name if your object is part of a larger web site the name which should be displayed for the overall site e g imdb og video a url to a video file that complements this object for example line break solely for display purposes meta property og audio content https example com bond theme mp3 meta property og description content sean connery found fame and fortune as the suave sophisticated british agent james bond meta property og determiner content the meta property og locale content en_gb meta property og locale alternate content fr_fr meta property og locale alternate content es_es meta property og site_name content imdb meta property og video content https example com bond trailer swf the rdf schema in turtle can be found at ogp me ns structured properties some properties can have extra metadata attached to them these are specified in the same way as other metadata with property and content but the property will have extra the og image property has some optional structured properties og image url identical to og image og image secure_url an alternate url to use if the webpage requires https og image type a mime type for this image og image width the number of pixels wide og image height the number of pixels high og image alt a description of what is in the image not a caption if the page specifies an og image it should specify og image alt a full image example meta property og image content http example com ogp jpg meta property og image secure_url content https secure example com ogp jpg meta property og image type content image jpeg meta property og image width content 400 meta property og image height content 300 meta property og image alt content a shiny red apple with a bite taken out the og video tag has the identical tags as og image here is an example meta property og video content http example com movie swf meta property og video secure_url content https secure example com movie swf meta property og video type content application x shockwave flash meta property og video width content 400 meta property og video height content 300 the og audio tag only has the first 3 properties available since size doesn t make sense for sound meta property og audio content http example com sound mp3 meta property og audio secure_url content https secure example com sound mp3 meta property og audio type content audio mpeg arrays if a tag can have multiple values just put multiple versions of the same meta tag on your page the first tag from top to bottom is given preference during conflicts meta property og image content https example com rock jpg meta property og image content https example com rock2 jpg put structured properties after you declare their root tag whenever another root element is parsed that structured property is considered to be done and another one is started for example meta property og image content https example com rock jpg meta property og image width content 300 meta property og image height content 300 meta property og image content https example com rock2 jpg meta property og image content https example com rock3 jpg meta property og image height content 1000 means there are 3 images on this page the first image is 300x300 the middle one has unspecified dimensions and the last one is 1000 px tall object types in order for your object to be represented within the graph you need to specify its type this is done using the og type property meta property og type content website when the community agrees on the schema for a type it is added to the list of global types all other objects in the type system are curies of the form head prefix my_namespace https example com ns meta property og type content my_namespace my_type the global types are grouped into verticals each vertical has its own namespace the og type values for a namespace are always prefixed with the namespace and then a period this is to reduce confusion with user defined namespaced types which always have colons in them music namespace uri https ogp me ns music og type values music song music duration integer 1 the song s length in seconds music album music album array the album this song is from music album disc integer 1 which disc of the album this song is on music album track integer 1 which track this song is music musician profile array the musician that made this song music album music song music song the song on this album music song disc integer 1 the same as music album disc but in reverse music song track integer 1 the same as music album track but in reverse music musician profile the musician that made this song music release_date datetime the date the album was released music playlist music song identical to the ones on music album music song disc music song track music creator profile the creator of this playlist music radio_station music creator profile the creator of this station video namespace uri https ogp me ns video og type values video movie video actor profile array actors in the movie video actor role string the role they played video director profile array directors of the movie video writer profile array writers of the movie video duration integer 1 the movie s length in seconds video release_date datetime the date the movie was released video tag string array tag words associated with this movie video episode video actor identical to video movie video actor role video director video writer video duration video release_date video tag video series video tv_show which series this episode belongs to video tv_show a multi episode tv show the metadata is identical to video movie video other a video that doesn t belong in any other category the metadata is identical to video movie no vertical these are globally defined objects that just don t fit into a vertical but yet are broadly used and agreed upon og type values article namespace uri https ogp me ns article article published_time datetime when the article was first published article modified_time datetime when the article was last changed article expiration_time datetime when the article is out of date after article author profile array writers of the article article section string a high level section name e g technology article tag string array tag words associated with this article book namespace uri https ogp me ns book book author profile array who wrote this book book isbn string the isbn book release_date datetime the date the book was released book tag string array tag words associated with this book payment link namespace uri https ogp me ns payment beta only payment description string description about the payment link payment currency string the currency code iso 4217 of the payment payment amount float an amount requested on the payment link in decimal format payment expires_at datetime the date and time including minutes and seconds on which the payment link expires payment status enum pending paid failed expired status of the payment payment id string the unique identifier associated with the payment link for a given payment gateway or service provider payment success_url url a valid url that gets redirected when payment is success profile namespace uri http ogp me ns profile profile first_name string a name normally given to an individual by a parent or self chosen profile last_name string a name inherited from a family or marriage and by which the individual is commonly known profile username string a short unique string to identify them profile gender enum male female their gender website namespace uri https ogp me ns website no additional properties other than the basic ones any non marked up webpage should be treated as og type website types the following types are used when defining attributes in open graph protocol type description literals boolean a boolean represents a true or false value true false 1 0 datetime a datetime represents a temporal value composed of a date year month day and an optional time component hours minutes iso 8601 enum a type consisting of bounded set of constant string values enumeration members a string value that is a member of the enumeration float a 64 bit signed floating point number all literals that conform to the following formats 1 234 1 234 1 2e3 1 2e3 7e 10 integer a 32 bit signed integer in many languages integers over 32 bits become floats so we limit open graph protocol for easy multi language use all literals that conform to the following formats 1234 123 string a sequence of unicode characters all literals composed of unicode characters with no escape characters url a sequence of unicode characters that identify an internet resource all valid urls that utilize the http or https protocols implementations the open source community has developed a number of parsers and publishing tools let the facebook group know if you ve built something awesome too facebook object debugger facebook s official parser and debugger google rich snippets testing tool open graph protocol support in specific verticals and search engines php validator and markup generator ogp 2011 input validator and markup generator in php5 objects php consumer a small library for accessing of open graph protocol data in php opengraphnode in php a simple parser for php pyopengraph a library written in python for parsing open graph protocol information from web sites opengraph ruby ruby gem which parses web pages and extracts open graph protocol markup opengraph for java small java class used to represent the open graph protocol rdf rdfa parser perl rdfa parser which understands the open graph protocol the open graph protocol was originally created at facebook and is inspired by dublin core link rel canonical microformats and rdfa the specification described on this page is available under the open web foundation agreement version 0 9 this website is open source