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Semantic Web benefits
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Semantic Web benefits
Programs and sites can exchange information
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Semantic Web benefits
Programs and sites can exchange information
my-site.net your-site.org
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Semantic Web benefits
Programs and sites can exchange information
my-site.net your-site.orgcompany.com
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Semantic Web benefits
Programs and sites can exchange information
my-site.net your-site.orgcompany.com
2
Semantic Web benefits
Programs and sites can exchange information
my-site.net your-site.orgcompany.com
2
Semantic Web benefits
Programs and sites can exchange information
my-site.net your-site.orgcompany.com
2
Semantic Web benefits
Programs and sites can exchange information
my-site.net your-site.orgcompany.com
Search engines can display more relevant information in results
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Semantic Web benefits
Programs and sites can exchange information
my-site.net your-site.orgcompany.com
Search engines can display more relevant information in results
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Semantic Web benefits
Programs and sites can exchange information
my-site.net your-site.orgcompany.com
Search engines can display more relevant information in results
Data mashers can combine data from different datasets to find new and astounding things
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Semantic Web benefits
Programs and sites can exchange information
my-site.net your-site.orgcompany.com
Search engines can display more relevant information in results
Data mashers can combine data from different datasets to find new and astounding things
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Semantic Web benefits
Programs and sites can exchange information
my-site.net your-site.orgcompany.com
+
Search engines can display more relevant information in results
Data mashers can combine data from different datasets to find new and astounding things
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Semantic Web benefits
Programs and sites can exchange information
my-site.net your-site.orgcompany.com
+
Search engines can display more relevant information in results
Data mashers can combine data from different datasets to find new and astounding things
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Key (confusing) terms
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Key (confusing) terms
Machine Understandable
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Key (confusing) terms
RDF
Machine Understandable
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Key (confusing) terms
RDF
Machine UnderstandableLinked Data
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Key (confusing) terms
RDF
Machine UnderstandableLinked Data
SPARQL
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Key (confusing) terms
RDF
Machine UnderstandableLinked Data
SPARQLFederated Dataset
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Key (confusing) terms
RDF
Machine UnderstandableLinked Data
SPARQLFederated DatasetGiant
GlobalGraph
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Machine Understandable
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Machine Understandable
4
Machine Understandable
4
Machine Understandable
4
Machine Understandable
4
Machine Understandable
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Machine Understandable
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Machine Understandable
The Semantic Web helps machines understand what the information on a Web page is...
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Machine Understandable
The Semantic Web helps machines understand what the information on a Web page is...
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Machine Understandable
The Semantic Web helps machines understand what the information on a Web page is...
Lin Clarkis a name
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Machine Understandable
Lin Clarkis a name
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Machine Understandable
and the relationships between different pieces of information.
Lin Clarkis a name
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Machine Understandable
and the relationships between different pieces of information.
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Machine Understandable
and the relationships between different pieces of information.
linclark.jpgis a pictureof a person
named Lin Clark
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RDF
RDF
esource
escription
ramework
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RDF
Everything is a resource
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RDF
Everything is a resourceA resource is a named thing
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RDF
Everything is a resourceA resource is a named thing
this
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RDF
Everything is a resource
this
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RDF
Everything is a resource
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RDF
Everything is a resource
http://lin-clark.com/page.html#this
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RDF
Everything is a resource
http://lin-clark.com/page.html#this
URI
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RDF
Everything is a resource
http://lin-clark.com/page.html#this
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RDF
Everything is a resource
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RDF
Everything is a resource
lin:this
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RDF
Everything is a resource
lin:this
Namespacexmlns:lin=”http://lin-clark.com/page.html#
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RDF
Everything is a resource
lin:this
CURIENamespacexmlns:lin=”http://lin-clark.com/page.html#
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RDF
A resource can be a document
dblp:this
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RDF
A resource can be a document
dblp:this
foaf:Document
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RDF
A resource can be a company
deri:this
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RDF
A resource can be a company
deri:this
foaf:Organization
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RDF
A resource can even be a person
lin:me
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RDF
A resource can even be a person
lin:me
foaf:Person
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RDF
You can describe properties of that person...
lin:me
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RDF
You can describe properties of that person...
lin:me
foaf:name Lin Clark
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RDF
You can describe properties of that person...
lin:me
foaf:name Lin Clark
foaf:mbox [email protected]
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RDF
You can describe properties of that person...
lin:me
foaf:name Lin Clark
foaf:mbox [email protected]
foaf:birthday 07-01
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RDF
and describe how that person is related to other resources
lin:me
deri:thisdblp:this
swrc:employsfoaf:made
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SVO
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SVO
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SVO
Subject
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SVO
Subject Verb
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SVO
Subject Verb Object
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SVO
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SVO
SVO
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SVO
SVO
My
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SVO
SVO
My name is
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SVO
SVO
My name is Lin Clark
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SVO
SVO
<http://lin-clark.com/#me>
<http://xmlns.com/foaf/0.1/name>
My name is Lin Clark
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SVO
SVO
<http://lin-clark.com/#me>
<http://xmlns.com/foaf/0.1/name>
“Lin Clark”
My name is Lin Clark
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SVO
SVO
My name is Lin Clark
<http://lin-clark.com/#me>
<http://xmlns.com/foaf/0.1/name>
“Lin Clark”
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SVO
SVO
My name is Lin Clark
<http://lin-clark.com/#me>
<http://xmlns.com/foaf/0.1/name>
prefix=”lin: http://lin-clark.com/#”
“Lin Clark”
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SVO
SVO
My name is Lin Clark
<http://xmlns.com/foaf/0.1/name>
prefix=”lin: http://lin-clark.com/#”
“Lin Clark”
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SVO
SVO
My name is Lin Clark
<http://xmlns.com/foaf/0.1/name>
prefix=”lin: http://lin-clark.com/#”
lin:me
“Lin Clark”
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SVO
SVO
My name is Lin Clark
<http://xmlns.com/foaf/0.1/name>
prefix=”lin: http://lin-clark.com/#”
lin:me
prefix=”foaf : http://xmlns.com/foaf/
“Lin Clark”
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SVO
SVO
My name is Lin Clark
prefix=”lin: http://lin-clark.com/#”
lin:me
prefix=”foaf : http://xmlns.com/foaf/
“Lin Clark”
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SVO
SVO
My name is Lin Clark
prefix=”lin: http://lin-clark.com/#”
lin:me foaf:name
prefix=”foaf : http://xmlns.com/foaf/
“Lin Clark”
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SVO
SVO
My name is Lin Clark
prefix=”lin: http://lin-clark.com/#”
lin:me foaf:name
prefix=”foaf : http://xmlns.com/foaf/
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SVO
SVO
My name is Lin Clark
“Lin Clark”
prefix=”lin: http://lin-clark.com/#”
lin:me foaf:name
prefix=”foaf : http://xmlns.com/foaf/
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SVO
SVO
My name is Lin Clark
“Lin Clark”
prefix=”lin: http://lin-clark.com/#”
lin:me foaf:name
prefix=”foaf : http://xmlns.com/foaf/
I know Stéphane
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SVO
SVO
My name is Lin Clark
“Lin Clark”
prefix=”lin: http://lin-clark.com/#”
lin:me foaf:name
prefix=”foaf : http://xmlns.com/foaf/
I know Stéphane
lin:me
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SVO
SVO
My name is Lin Clark
“Lin Clark”
prefix=”lin: http://lin-clark.com/#”
lin:me foaf:name
prefix=”foaf : http://xmlns.com/foaf/
I know Stéphane
lin:me foaf:knows
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SVO
SVO
My name is Lin Clark
“Lin Clark”
prefix=”lin: http://lin-clark.com/#”
lin:me foaf:name
prefix=”foaf : http://xmlns.com/foaf/
I know Stéphane
lin:me foaf:knows scor:me
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SVO
SVO
My name is Lin Clark
“Lin Clark”
prefix=”lin: http://lin-clark.com/#”
lin:me foaf:name
prefix=”foaf : http://xmlns.com/foaf/
I know Stéphane
} Literal
lin:me foaf:knows scor:me
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SVO
SVO
My name is Lin Clark
“Lin Clark”
prefix=”lin: http://lin-clark.com/#”
lin:me foaf:name
prefix=”foaf : http://xmlns.com/foaf/
I know Stéphane
} Literal
} Resourcelin:me foaf:knows scor:me
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Federated Dataset
lin:me
deri:thisdblp:this
swrc:employsfoaf:made
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Federated Dataset
Because we are using http URIs,these resources don’t need to be in the same database
lin:me
deri:thisdblp:this
swrc:employsfoaf:made
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Federated Dataset
the resources can be distributed across the Webin a federated way
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Giant Global Graph
And when all resources are described this way,the Web becomes one giant database...
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Giant Global Graph
And when all resources are described this way,the Web becomes one giant database...
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Giant Global Graph
And when all resources are described this way,the Web becomes one giant database...
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Giant Global Graph
And when all resources are described this way,the Web becomes one giant database...
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Giant Global Graph
And when all resources are described this way,the Web becomes one giant database...
18
Giant Global Graph
And when all resources are described this way,the Web becomes one giant database...
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Giant Global Graph
And when all resources are described this way,the Web becomes one giant database...
18
Giant Global Graph
And when all resources are described this way,the Web becomes one giant database...
18
Giant Global Graph
And when all resources are described this way,the Web becomes one giant database...
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Giant Global Graph
And when all resources are described this way,the Web becomes one giant database...
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Giant Global Graph
And when all resources are described this way,the Web becomes one giant database...
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Giant Global Graph
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SPARQL
Find and retrieve information from the graph
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SPARQL
Find and retrieve information from the graph
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SPARQL
Find and retrieve information from the graph
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SPARQL
Find and retrieve information from the graph
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SPARQL
Find and retrieve information from the graph
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SPARQL
Find and retrieve information from the graph
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SPARQL
Find and retrieve information from the graph
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SPARQL
Find and retrieve information from the graphusing SQL?
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SPARQL
Find and retrieve information from the graph
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SPARQL
Find and retrieve information from the graphusing SPARQL
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The Semantic Web
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The Semantic Web
Machine Understandable
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The Semantic Web
RDF
Machine Understandable
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The Semantic Web
RDF
Machine UnderstandableLinked Data
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The Semantic Web
RDF
Machine UnderstandableLinked Data
SPARQL
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The Semantic Web
RDF
Machine UnderstandableLinked Data
SPARQLFederated Dataset
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The Semantic Web
RDF
Machine UnderstandableLinked Data
SPARQLFederated DatasetGiant
GlobalGraph
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Why Drupal?
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Why Drupal?
Similarities
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Why Drupal?
Similarities
•Both have structured data
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Why Drupal?
Similarities
•Both have structured data
•Data is structured in a similar way—instances of types with properties and relationships
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Why Drupal?
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Why Drupal?
Differences
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Why Drupal?
Differences
•Drupal’s structure stays hidden in the database, RDF structure is exposed on the page
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Why Drupal?
Differences
•Drupal’s structure stays hidden in the database, RDF structure is exposed on the page
•Drupal’s field names are unique to the site and not explicitly defined,RDF terms are universally dereferencable and explicitly defined
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RDF in Drupal 7 core
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML+RDFa 1.0//EN" "http://www.w3.org/MarkUp/DTD/xhtml-rdfa-1.dtd"><html xmlns="http://www.w3.org/1999/xhtml" xmlns:foaf="http://xmlns.com/foaf/0.1/" xmlns:dc="http://purl.org/dc/elements/1.1/" version="XHTML+RDFa 1.0" xml:lang="en">
<head><meta http-equiv="Content-Type" content="text/html; charset=utf-8" /> <title>Lin-Clark | Pittsburgh-based Web developer</title> <meta http-equiv="Content-Type" content="text/html; charset=utf-8" /> <link type="text/css" rel="stylesheet" media="all" href="/sites/all/modules/admin_menu/admin_menu.css?8" /><link type="text/css" rel="stylesheet" media="all" href="/sites/all/modules/views/css/views.css?8" /><link type="text/css" rel="stylesheet" media="all" href="/sites/default/files/css/css_92e513ffd2110f82d787173e8b07d9c7.css" /><link type="text/css" rel="stylesheet" media="print" href="/sites/default/files/css/css_9c70a5072a56f4bc83a718ec42481c1a.css" /><!--[if IE]><link type="text/css" rel="stylesheet" media="all" href="/sites/all/themes/zen/zen/ie.css?8" /><![endif]--> <script type="text/javascript" src="/sites/default/files/js/js_f68bf536b867998e80bb0bd586727a4a.js"></script><script type="text/javascript"><!--//--><![CDATA[//><!--jQuery.extend(Drupal.settings, { "basePath": "/", "admin_menu": { "margin_top": 1, "position_fixed": 1 }, "cobalt": { "state": "1", "path": "node/33", "bindings": [ "Alt+space", "Ctrl+space" ], "nodes_current": "33" }, "googleanalytics": { "trackOutgoing": 1, "trackMailto": 1, "trackDownload": 1, "trackDownloadExtensions": "7z|aac|avi|csv|doc|exe|flv|gif|gz|jpe?g|js|mp(3|4|e?g)|mov|pdf|phps|png|ppt|rar|sit|tar|torrent|txt|wma|wmv|xls|xml|zip" }, "jcarousel": { "#viewscarousel-Site-Screenshots-block-1": { "scroll": 1, "visible": 1, "animation": "slow", "auto": 6, "wrap": "both", "skin": "ie7" } } });//--><!]]></script></head><body class="front logged-in node-type-page one-sidebar sidebar-right">
<div id="page"><div id="page-inner"><a id="navigation-top"></a> <div id="header"><div id="header-inner" class="clear-block">
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RDF in Drupal 7 core
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML+RDFa 1.0//EN" "http://www.w3.org/MarkUp/DTD/xhtml-rdfa-1.dtd"><html xmlns="http://www.w3.org/1999/xhtml" xmlns:foaf="http://xmlns.com/foaf/0.1/" xmlns:dc="http://purl.org/dc/elements/1.1/" version="XHTML+RDFa 1.0" xml:lang="en">
<head><meta http-equiv="Content-Type" content="text/html; charset=utf-8" /> <title>Lin-Clark | Pittsburgh-based Web developer</title> <meta http-equiv="Content-Type" content="text/html; charset=utf-8" /> <link type="text/css" rel="stylesheet" media="all" href="/sites/all/modules/admin_menu/admin_menu.css?8" /><link type="text/css" rel="stylesheet" media="all" href="/sites/all/modules/views/css/views.css?8" /><link type="text/css" rel="stylesheet" media="all" href="/sites/default/files/css/css_92e513ffd2110f82d787173e8b07d9c7.css" /><link type="text/css" rel="stylesheet" media="print" href="/sites/default/files/css/css_9c70a5072a56f4bc83a718ec42481c1a.css" /><!--[if IE]><link type="text/css" rel="stylesheet" media="all" href="/sites/all/themes/zen/zen/ie.css?8" /><![endif]--> <script type="text/javascript" src="/sites/default/files/js/js_f68bf536b867998e80bb0bd586727a4a.js"></script><script type="text/javascript"><!--//--><![CDATA[//><!--jQuery.extend(Drupal.settings, { "basePath": "/", "admin_menu": { "margin_top": 1, "position_fixed": 1 }, "cobalt": { "state": "1", "path": "node/33", "bindings": [ "Alt+space", "Ctrl+space" ], "nodes_current": "33" }, "googleanalytics": { "trackOutgoing": 1, "trackMailto": 1, "trackDownload": 1, "trackDownloadExtensions": "7z|aac|avi|csv|doc|exe|flv|gif|gz|jpe?g|js|mp(3|4|e?g)|mov|pdf|phps|png|ppt|rar|sit|tar|torrent|txt|wma|wmv|xls|xml|zip" }, "jcarousel": { "#viewscarousel-Site-Screenshots-block-1": { "scroll": 1, "visible": 1, "animation": "slow", "auto": 6, "wrap": "both", "skin": "ie7" } } });//--><!]]></script></head><body class="front logged-in node-type-page one-sidebar sidebar-right">
<div id="page"><div id="page-inner"><a id="navigation-top"></a> <div id="header"><div id="header-inner" class="clear-block">
23
Universities in RDFRDF in Drupal 7 core
Submitted by Lin on Sat, 2009-05-02 10:28
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Universities in RDFRDF in Drupal 7 core
Submitted by Lin on Sat, 2009-05-02 10:28
<div class="submitted"> Submitted by <a href="/user/1">Lin</a> on Sat, 2009-05-02 10:28</div>
24
Universities in RDFRDF in Drupal 7 core
Submitted by Lin on Sat, 2009-05-02 10:28
24
Universities in RDFRDF in Drupal 7 core
Submitted by Lin on Sat, 2009-05-02 10:28
<div class="submitted"> Submitted by <span rel="sioc:has_creator"><a href="/user/1">Lin</a></span> on Sat, 2009-05-02 10:28</div>
24
Universities in RDFRDF in Drupal 7 core
Submitted by Lin on Sat, 2009-05-02 10:28
24
Universities in RDFRDF in Drupal 7 core
Submitted by Lin on Sat, 2009-05-02 10:28
<div class="submitted"> Submitted by <span rel="sioc:has_creator"><a href="/user/1" typeof="sioc:User" property="foaf:name">Lin</a></span> on Sat, 2009-05-02 10:28</div>
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?25
25
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Microformats
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Microformats
Bring structured data to HTML
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Microformats
Bring structured data to HTML
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Microformats
Bring structured data to HTML
Limitations
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Microformats
Bring structured data to HTML
Limitations
•Not extensible — if your use case doesn’t match the existing formats, you can’t make your own
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Microformats
Bring structured data to HTML
Limitations
•Not extensible — if your use case doesn’t match the existing formats, you can’t make your own
•Not scopable — properties set on child elements get misinterpreted as properties of parents
26
RDFa and Microdata
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RDFa and Microdata
RDFa
27
RDFa and Microdata
RDFa
•about
27
RDFa and Microdata
RDFa
•about
•property, rel
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RDFa and Microdata
RDFa
•about
•property, rel
•typeof
27
RDFa and Microdata
RDFa
•about
•property, rel
•typeof
Microdata
27
RDFa and Microdata
RDFa
•about
•property, rel
•typeof
Microdata
• itemid
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RDFa and Microdata
RDFa
•about
•property, rel
•typeof
Microdata
• itemid
• itemprop
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RDFa and Microdata
RDFa
•about
•property, rel
•typeof
Microdata
• itemid
• itemprop
• itemtype
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RDFa and Microdata
RDFa
•about
•property, rel
•typeof
Microdata
• itemid
• itemprop
• itemtype
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A closer look at the RDF that Drupal 7 includes out of the box
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RDF for free in Drupal 7•All entity types:
node comment
user file
term vocabulary
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RDF for free in Drupal 7•Attributes:
title date (created, updated)
all fields* comment count
reply of (comment) creator
* provided a mapping has been defined for it
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Drupal 7 entities “cool URIs”•All entities have their own URI
•node/3
•comment/6#comment-6
•user/2
•taxonomy/term/5
http://www.w3.org/TR/cooluris/31
Drupal 7 RDFa goodness•FOAF, SIOC, SKOS, DC “out of the box”
•All users have a WebID URI
user/3#me => foaf:Person
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Drupal 7 default mappings
nodesioc:Item,
foaf:Document
titledc:title
creation datedc:created, dc:date
bodycontent:encoded
usersioc:UserAccount
sioc:has_creator
user name
termskos:Concept
dc:subject
descriptionskos:definition
nameskos:prefLabel,rdfs:label
foaf:name
commentsioc:Post,
sioct:Comment
sioc:reply_of
sioc:reply_of
modification datedc:modified
number repliessioc:num_replies
vocabularyskos:Concept
Scheme
skos:inScheme
skos:broader
term descriptionrdfs:comment
namedc:title
homepage
foaf:page
titledc:title
creation datedc:created, dc:date
bodycontent:encoded
modification datedc:modified
sioc:has_creator
33
RDFa demo: how machines see Drupal pages
•Ubiquity RDFa
•Sig.ma - Semantic Information Mashup
http://ubiquity-rdfa.googlecode.com/svn/trunk/ubiquity-loader.js
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History of Semantics in Drupal•rdf.php (2000, Dries)
•FOAF, vCard (2004, walkah)
•Relationship (2005, dman)
•Semantic Search (2006, hendler)
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History of Semantics in Drupal•RDF (2007, Arto)
•OpenCalais (febbraro, 2008)
•RDF CCK (2008, scor)
•and more...
37
RDF in Drupal 7 - the story so far
38
May 2009DERI, Galway
RDF in Drupal 7 - the story so far
39
RDF in Drupal 7 - the story so far•61 issues in total
•11 months of coding
•401 lines of code
•372 lines of documentation
•537 lines of tests
40
RDFa growth
•fastest growing data format on the Web
•3.6% of the pages in the Web
•510% growth in the last year
http://tripletalk.wordpress.com/2011/01/25/rdfa-deployment-across-the-web/41
http://rdfa.info/2009/12/11/best-buy-and-rdfa/
RDFa and e-Commerce: BestBuy•GoodRelations
•30 % percent increase in traffic
•Yahoo observes a 15% increase in the Click-through-Rate
42
Why RDF and RDFa?•W3C standards
•BBC, New York Times, Reuters, Facebook
•Google, Yahoo!
43
RDF in contrib
44
RDF in contribRDF Mapping User Interface for site administrators to customize mappings
44
RDF in contrib
45
SPARQL Endpoint: anyone can query your site data with SPARQL queries
RDF in contrib
45
SPARQL Endpoint: anyone can query your site data with SPARQL queries
Figure 3.6: A list of SPARQL results (left) and an RDF SPARQL Proxy profile form(right).
a vocabulary page containing some general information about the vocabulary, followedby the descriptions of all its classes and properties.
Editor. After a vocabulary maintainer logs in, additional links become visible onthe vocabulary page and allow adding new terms, as well as editing of existing terms.Terms are created and edited through a web form (Figure 3.8). The form allows entryof an ID (to become part of the term’s URI), label, comment, subclasses, subproperties,domain, range, disjoint classes, inverse properties, and marking a property as functionalor inverse functional. Authenticated users can also create new vocabularies and modifythe vocabulary metadata.
RDFS output, URIs and content negotiation. The URIs identifying classes andproperties are always generated by appending the hash character and the term’s ID tothe URI of the vocabulary page. This makes sure that the vocabulary page is returnedwhen these URIs are resolved. HTTP requests to the vocabulary page are subject tocontent negotiation. Web browsers will see the HTML variant shown in Figure 3.7.RDF-aware clients will receive the RDFS/OWL specification, either in RDF/XML orN3 syntax. In a nutshell, Neologism publishes standards-compliant vocabularies on theWeb without requiring any additional effort on the part of vocabulary maintainers.
Implementation. Neologism is implemented in PHP as a Drupal module. Drupalreduces development time by providing many features for free, such as account man-agement, database abstraction layer and content managemement. It also makes inte-gration with a larger Drupal-based site very easy, for example to provide a news blogand discussion forum for each vocabulary built with Neologism. All data is stored ina MySQL database. RAP13 is used to serialize RDF/XML and N3. The PHP ContentNegotiation library14 is used instead of the usual Apache rules to implement contentnegotiation, and Vapour15 was used to validate its correctness. The overview diagram
13http://www4.wiwiss.fu-berlin.de/bizer/rdfapi/14http://ptlis.net/source/php-content-negotiation/15http://vapour.sourceforge.net/
43
RDF in contrib
45
What’s coming up
RDF in contrib
46
What’s coming upSPARQL Views: A way of connecting to external RDF sources and displaying the results within the context of your site, using different styles as appropriate.
RDF in contrib
46
What’s coming upSPARQL Views: A way of connecting to external RDF sources and displaying the results within the context of your site, using different styles as appropriate.
my-site.net your-site.orgcompany.com
RDF in contrib
46
RDF in Drupal 7 for developershttp://api.drupal.org/api/group/rdf/7
47
RDF namespaces declaration
48
3 ways to set RDF mappings1. Entity type level defaults:
hook_rdf_mappings() 'bundle' => RDF_DEFAULT_BUNDLE,
2. Content type / bundle level override:
hook_rdf_mappings() 'bundle' => my_content_type,
3. Alter mappings for existing bundles:
rdf_mapping_save()
49
Entity type level RDF mappings
50
Entity type level RDF mappings
nodesioc:Item,
foaf:Document
titledc:title
creation datedc:created, dc:date
bodycontent:encoded
usersioc:UserAccount
sioc:has_creator
user name
termskos:Concept
dc:subject
descriptionskos:definition
nameskos:prefLabel,rdfs:label
foaf:name
commentsioc:Post,
sioct:Comment
sioc:reply_of
sioc:reply_of
modification datedc:modified
number repliessioc:num_replies
vocabularyskos:Concept
Scheme
skos:inScheme
skos:broader
term descriptionrdfs:comment
namedc:title
homepage
foaf:page
titledc:title
creation datedc:created, dc:date
bodycontent:encoded
modification datedc:modified
sioc:has_creator
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Content type / bundle level RDF mappings
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Content type / bundle level RDF mappings
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Custom mappings with rdf_mapping_save()
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Custom mappings with rdf_mapping_save()
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Drupal 7 RDFa internals•Mappings cached with entity info (fast)
•RDFa markup added via the theme layer. Impacts performance on pages with many comments: turn on page cache.
56
CreditsMark Birbeck
Alex Bronstein
John Breslin
Benjamin Doherty
Stefan Freudenberg
Rolf Guescini
Daniel F. Kudwien
Florian Lorétan
Frédéric Marand
Benjamin Melançon
John Morahan
Dries Buytaert
Angie Byron
catch
chx
Peter Wolanin
Barry Jaspan
yched
Christopher Ruppel
Kanok Ausawawaranun
John Breslin
Scriptall
cocoate
Frank Febbraro
Dirk Ruediger
Lin Clark
Prometheus
William Hayes
Christopher Albrecht
Roundabout Publications
Aris Vidalis
Gerard Roos
Ludovico Fischer
Johannes Keizer
Hobury
Benjamin Doherty
Giorgos Kontopoulos
Thomas Speer
Łukasz Kowalski
Raul Pedro Fernandes Santos
Alexander Langer
Robert Douglass
Rob Loach
Andrew Kennedy
Knud Möller
Udo Gerhards
Kevin Bridges
Peter Galiba
57
Sponsored by
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http://cph2010.drupal.org/node/14733
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