Rdf dating site

The body of knowledge modeled by a collection of statements may be subjected to reification , in which each statement that is each triple subject-predicate-object altogether is assigned a URI and treated as a resource about which additional statements can be made, as in " Jane says that John is the author of document X". Reification is sometimes important in order to deduce a level of confidence or degree of usefulness for each statement.

In a reified RDF database, each original statement, being a resource, itself, most likely has at least three additional statements made about it: More statements about the original statement may also exist, depending on the application's needs.

Borrowing from concepts available in logic and as illustrated in graphical notations such as conceptual graphs and topic maps , some RDF model implementations acknowledge that it is sometimes useful to group statements according to different criteria, called situations , contexts , or scopes , as discussed in articles by RDF specification co-editor Graham Klyne. Then, when updates are made to the source, corresponding statements can be changed in the model, as well.

Implementation of scopes does not necessarily require fully reified statements.

W3C Note in Development @@@Date@@@

Some implementations allow a single scope identifier to be associated with a statement that has not been assigned a URI, itself. The following example is taken from the W3C website [44] describing a resource with statements "there is a Person identified by http: In addition, the subject has a type with URI http: Certain concepts in RDF are taken from logic and linguistics , where subject-predicate and subject-predicate-object structures have meanings similar to, yet distinct from, the uses of those terms in RDF.

In the English language statement 'New York has the postal abbreviation NY' , 'New York' would be the subject, 'has the postal abbreviation' the predicate and 'NY' the object. The object could be a resource or literal element. In this example, "urn: Note that the URIs chosen here are not standard, and don't need to be, as long as their meaning is known to whatever is reading them. In a like manner, given that "http: However, RDF puts the information in a formal way that a machine can understand.

The purpose of RDF is to provide an encoding and interpretation mechanism so that resources can be described in a way that particular software can understand it; in other words, so that software can access and use information that it otherwise couldn't use. Both versions of the statements above are wordy because one requirement for an RDF resource as a subject or a predicate is that it be unique.


RDF Concepts and Abstract Syntax

The subject resource must be unique in an attempt to pinpoint the exact resource being described. The predicate needs to be unique in order to reduce the chance that the idea of Title or Publisher will be ambiguous to software working with the description.

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If the software recognizes http: The following example, written in Turtle, shows how such simple claims can be elaborated on, by combining multiple RDF vocabularies. Here, we note that the primary topic of the Wikipedia page is a "Person" whose name is "Tony Benn":. Some uses of RDF include research into social networking. It will also help people in business fields understand better their relationships with members of industries that could be of use for product placement. RDF is being used to have a better understanding of road traffic patterns.

This is because the information regarding traffic patterns is on different websites, and RDF is used to integrate information from different sources on the web. Before, the common methodology was using keyword searching, but this method is problematic because it does not consider synonyms. This is why ontologies are useful in this situation.

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But one of the issues that comes up when trying to efficiently study traffic is that to fully understand traffic, concepts related to people, streets, and roads must be well understood. Since these are human concepts, they require the addition of fuzzy logic.

This is because values that are useful when describing roads, like slipperiness, are not precise concepts and cannot be measured. This would imply that the best solution would incorporate both fuzzy logic and ontology. From Wikipedia, the free encyclopedia. This article has multiple issues. Please help improve it or discuss these issues on the talk page. Learn how and when to remove these template messages.

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RDF Site Summary 1.0 Modules: Email

Archived from the original on June 16, Archived from the original on February 14, Retrieved 5 May A line-based syntax for an RDF graph". Extending N-Triples with Context". Archived from the original on The possible uses of the Web seem endless, but there the technology is missing a crucial piece.

Missing is a part of the Web which contains information about information - labeling, cataloging and descriptive information structured in such a way that allows Web pages to be properly searched and processed in particular by computer. RDF allows for representation of rich metadata relationships beyond what is possible with earlier flat-structured RSS.

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Syndication is here defined as making data available online for retrieval and further transmission, aggregation, or online publication. The specifics of the various intricacies of syndication systems free vs. The core of RSS 1. Backward Compatibility with RSS 0. While ad hoc extensibility is of course encouraged, it is hoped that a core set of agreed-upon modules covering such functionality as taxonomy, aggregation, Dublin Core, etc will emerge.

W3C Interest Group Note 29 September 2005

See the Modules section below, as well as the registry of core RSS 1. One restriction imposed on sub-elements of top-level channel, image, item, and textinput elements [ 5. This proposal only constrains the immediate sub-elements. Any further depth of rich content or repeated elements is already well-defined using RDF syntax. Encoding While RSS 0. XML reserves certain characters for markup. In order to include these in an RSS document, they must be replaced by their entity reference:. The following two entity references are also recognized by conforming XML parsers. While common, their use is optional.

They are, however, required when including a quote character in a string quoted using the same character; e.

RDF Site Summary (RSS) 1.0

In the following core element descriptions, the following notation is used:. As a best practice suggestion and to further ensure backward compatibility with RSS 0. Optional unless specifying encoding.

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The outermost level in every RSS 1. The opening RDF tag assocaties the rdf: While any valid namespace prefix may be used, document creators are advised to consider "rdf: Those wishing to be strictly backward-compatible with RSS 0. Required exactly as shown, aside from any additional namespace declarations Model: The channel element contains metadata describing the channel itself, including a title, brief description, and URL link to the described resource the channel provider's home page, for instance.

Required Required Attribute s: Establishes an RDF association between the optional image element [ 5. Required only if image element present Model: An RDF table of contents, associating the document's items [ 5. Note that items appearing in the document but not as members of the channel level items sequence are likely to be discarded by RDF parsers.

Establishes an RDF association between the optional textinput element [ 5. Required only if texinput element present Model: An image to be associated with an HTML rendering of the channel. This image should be of a format supported by the majority of Web browsers. While the later 0. Optional; if present, must also be present in channel element [ 5.

The alternative text "alt" attribute associated with the channel's image tag when rendered as HTML. Required if the image element is present Model: This, as with the channel's title link, is commonly the parent site's home or news page.