What is RDF?
AgMES - Frequently Asked QuestionsRDF (Resource Description Framework) is a framework for metadata; it provides interoperability between applications that exchange machine-understandable information on the Web. It contains three basic elements: Properties, which are specific aspects, characteristics, attributes, or relations used to describe a resource; Statements, which describe a specific resource together with a named property, plus the value of that property. For More information, see: W3C pages on RDF
Related QuestionseBusiness Resource - Introduction to eBusiness - Any Questio...Resource Description Framework is the use of Metatags in web design to help find information quickly. Metatags are information about information e.g. lookup fields such as Author, Date, Subject. Just like in a real-world video shop there are classifications of videos: thrillers, comedy, new releases that help us find the video we are looking for more easily - classifying information online through RDF has the same result.Related Questions
W3C Semantic Web FAQRDFâ?"the Resource Description Frameworkâ?"is a standard model for data interchange on the Web. RDF has features that facilitate data merging even if the underlying schemas differ, and it specifically supports the evolution of schemas over time without requiring all the data consumers to be changed. RDF extends the linking structure of the Web to use URIs to name the relationship between things as well as the two ends of the link (this is usually referred to as a â??tripleâ??).Related Questions
Frequently Asked Questions about Computing for Medicine and ...Resource Description Framework (RDF) is a XML variant for describing about resources, often web resources. If is the basis for some variants of RSS, the Gene Ontology Project, the US National Library of Medicine Medical Subject Headings system, the College of American Pathologists (CAP) SNOMED® (the Systematized Nomenclature of Medicine) language, the Biological Pathways Exchange (BioPAX) project, and Open Biomedical Ontologies (OBO) vocabularies.Related Questions
What is the relationship between Dublin Core Metadata and RDF and XML?
DCMI Frequently Asked Questions (FAQ)Dublin Core Metadata Element Set (IETF RFC 2413) and RDF (Resource Description Framework) (W3C Recommendation) are two distinct specifications. Neither requires the other, but their co-evolution forms a natural complement within the Web's greater metadata architecture. Both the Dublin Core and RDF communities have a number of members in common, and have evolved side-by-side. The Dublin Core community provided much of the basic requirements that were used to design RDF.
Related QuestionsCan I use SPARQL to query data that's not stored in RDF?
SPARQL Protocol and Query Language: SPARQL Frequently Asked ...Several software packages exist which allow SPARQL queries to generate answers from data sources other than RDF, such as relational databases, LDAP servers, or XML data. The community maintains a list of these tools at the W3C ESW Wiki.
Related QuestionsCan I receive the results of SPARQL queries as RDF?
SPARQL Protocol and Query Language: SPARQL Frequently Asked ...The SPARQL protocol requires that the results of SPARQL CONSTRUCT and DESCRIBE queries be RDF graphs. SELECT and ASK queries, on the other hand, usually have their results returned as XML (or sometimes as JSON). However, as part of the group's test suite, the DAWG includes an RDF vocabulary which can be used to represent the results of SELECT or ASK queries in RDF.
Related QuestionsWhat is RDF Gateway?
Intellidimension Semantic Web SearchRDF Gateway is a platform for Semantic Web applications and agents. It is a both a web server and a web agent with a powerful native RDF database engine that makes it ideal for gathering and publishing rich information on the Internet. Applications and agents are written in an easy-to-use scripting language, based on JavaScript and SQL, that can be embedding right into web documents.
Related QuestionsHow can I query transitive closures / trees / hierarchies / RDF lists in SPARQL?
SPARQL Protocol and Query Language: SPARQL Frequently Asked ...There is no built-in support within SPARQL to query hierarchical structures of an unknown depth (e.g. trees or lists), to query transitive relations, or to query via XPath like paths. The Data Access Working Group postponed this issue in early 2005. Repeated queries. A repeating structure can be queried via a series of queries.
Related QuestionsCan I use SPARQL to insert, update, or delete RDF data?
SPARQL Protocol and Query Language: SPARQL Frequently Asked ...The current, standardized version of SPARQL deals only with retrieving selected data from RDF graphs. There is no equivalent of the SQL INSERT, UPDATE, or DELETE statements. Most RDF-based applications handle new, changing, and stale data directly via the APIs provided by specific RDF storage systems. Alternatively, RDF data can exist virtually (i.e. created on-demand in response to a SPARQL query).
Related QuestionsBut I do RDF, why should I be interested?
faqs-for-rdf - MicroformatsMicroformats can lower the barrier to putting explicit data on the Web. This is entirely in line with the aims of the Semantic Web (http://www.w3.org/2001/sw/).
Related Questionsmime-types-for-rdf-docs: What mime type should RDF Schema and other RDF documents have?
RDF Issue Trackingrdfs-clarify-subClass-and-instance: Suggestion of clearer discussion of use of subClass and instance relationships simultaneously. rdfs-container-membership-superProperty: There is a need for a superproperty of all the container membership properties. rdfs-clarify-subClass-and-instance: Suggestion of clearer discussion of use of subClass and instance relationships simultaneously.
Related QuestionsIssue mime-types-for-rdf-docs: What mime type should RDF Schema and other RDF documents have?
RDF Issue TrackingSummary: Concern that the RDFS CR offers no guidance about the mime type to be assigned to RDF Schema documents, or to RDF/XML files in general. Notes: this concern also applies to the RDF Model and Syntax specification, and to mixed-namespace XML documents in the general case. See also XML mime type internet drafts. Issue http://www.w3.
Related QuestionsWhat are RSS, RDF or ATOM feeds?
Frequently Asked Questions - Feedo StyleRSS, RDF or ATOM feeds (or XML feeds) are an XML-based formats for content distribution. News, information, enterprise applications and weblogs (blogs) can all be published with XML feeds. Feedo Style leverages these feeds by constantly scanning the content of a website for updates and then broadcasting those updates to your website (and to it's visitors) through personalized tickers.
Related QuestionsHow long should it take to import the RDF files?
Dominion Web - DWodp pro - Frequently Asked QuestionsThis varies from server to server but our initial import took approx 60 minutes for structure.rdf.u8 and 16 hours for content.rdf.u8. On a clean server with no other running processes this may be much faster.
Related QuestionsWhere can I find the ODP RDF files?
Dominion Web - DWodp pro - Frequently Asked QuestionsIt is quite correct that %$searchstring% would produce a better result, however the search would be very slow because we can't make use of the index on the title field. In version 1.1 we added an optional search process using MySQL's full text search capabilities (using MySQL 3.23.23 or higher) on both title and descriptions of websites. This will return results in a page rank order and producing much faster results.
Related QuestionsHow can we create our own RDF file?
About SWEDIf you want to create your own SWED RDF file rather than use the SWED data creation form, probably the easiest way is to take the text of an existing SWED RDF file, like the one below, and use that as a template or simply replace the values in the text to those that you require. For a brief description of the SWED RDF file and a simple example see the semantic portals page.
Related QuestionsHow does XDI relate to RDF?
OASIS XRI Data Interchange (XDI) TCThis is a hard question to answer in a FAQ. A summary answer is that the proposed XDI meta-schema and RDF use slightly different models for graphing data relationships. This might be compared to the difference between Cartesian and radian coordinate systems. Either can identify any set of points in a plane, but each is optimized for certain kinds of geometric shapes (e.g., line figures vs. circles).
Related QuestionsHow do I put RDF into my (X)HTML Pages?
W3C Semantic Web FAQUnfortunately, it is currently not possible to incorporate full RDF into XHTML without violating the validity of the resulting XHTML, except for the usage of the meta and the link elements in the header. The best solution is to store the RDF separately and use the URIs to refer to the XHTML page and the link element in the XHTML page to refer to the RDF content. This technique is often called an RDF autodiscovery link and is used by a number of tools already.
Related QuestionsWhat formats can RDF be represented in?
W3C Semantic Web FAQRDF statements (or triples) can be encoded in a number of different formats, whether XML based (e.g., RDF/XML) or not (Turtle, N-triples, â?¦). In general it does not really matter which of these formats (or serializations) are used to express dataâ?"the information is represented in RDF triples and the particular format is only the â??syntactic sugarâ??. Most RDF tools can parse several of these serialization formats. Compare to â??numbersâ?? as opposed to â??numeralsâ??.
Related QuestionsWhy is my RDF data not getting updated?
Longwell FAQ - SIMILEWhen Longwell is started without arguments, it reads the default repository. When you load data using ./longwell -r /path/to/data it is aggregated with that default repository rather than updated. If you wish to update your RDF data, you must load it into a new repository using the -d switch: ./longwell -r /path/to/data -d /tmp/blah1.
Related Questionsrdf-equivalent-uri's: Should RDF have a mechanism for declaring two uri's to be equivalent?
RDF Issue Trackingrdfs-layered-subset: A request to define subset of RDFS with a more conventional layered architecture rdf-mapping-lists-and-containers: A request to define a formal semantic relationship between lists and containers. rdf-fragids-in-embedded-rdf: Defining the interpretation of fragment identifiers in RDF embedded in other document formats. rdf-plain-and-xml-literals: An XML literal without markup, e.g. "foo" should denote the same thing as the plain literal "foo".
Related QuestionsIssue rdf-equivalent-uris: Should RDF have a mechanism for declaring two uri's to be equivalent?
RDF Issue TrackingWhilst the WG recognises the importance of a mechanism for defining equivalence of URI's, the WG has decided it does not fit within the scope of its current charter. The WG notes that DAML+OIL has an equivalence mechanism which raises the question of which layer of the stack best suits such functionality. The WG also notes that by allowing cycles in rdfs:subPropertyOf and rdfs:subClassOf RDF Schema provides a related mechanism for properties and classes.
Related QuestionsHow can I query RDF data?
W3C Semantic Web FAQThe W3C Data Access Working Group has developed the SPARQL Query Language. SPARQL defines queries in terms of graph patterns that are matched against the directed graph representing the RDF data. SPARQL contains capabilities for querying required and optional graph patterns along with their conjunctions and disjunctions. The result of the match can also be used to construct new RDF graphs using separate graph patterns.
Related QuestionsHow do I update my personal RDF store from 1.1.72 to 1.1.80 format?
Frequently Asked QuestionsI am seeing exceptions in the output of feaindexadd or findexadd which contain some files which have non ascii chars in their names. When I read a directory with libferris it locks the CPU at 100% and doesn't seem to get anywhere after a very long time.
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