What is the RDF file extension? How to open a .rdf file? rdf file.

What kind of file is this - RDF?

Files with the .RDF extension contain information about a site's resources in the form of a structured document saved using RDF, short for Resource Description Framework.

The information is metadata such as a website map, update information, website description, and a list of keywords. Some programs also save their configurations using RDF format. A good example here is Mozilla Firefox, which saves window and panel settings using RDF files.

Program(s) that can open a file .RDF

Windows

MacOS

Linux

How to open RDF files

If a situation arises in which you cannot open an RDF file on your computer, there may be several reasons. The first and at the same time the most important (it occurs most often) is the absence of an appropriate RDF service application among those installed on your computer.

The easiest way to solve this problem is to find and download the appropriate application. The first part of the task has already been completed - programs for servicing the RDF file can be found below. Now you just need to download and install the appropriate application.

In the remainder of this page you will find other possible reasons causing problems with RDF files.

Possible problems with RDF files

The inability to open and work with an RDF file should not mean at all that we do not have the appropriate software installed on our computer. There may be other problems that also block our ability to work with the Resource Description Framework RSS Feed Format file. Below is a list of possible problems.

• The RDF file which is being opened has been corrupted.
• Invalid RDF file associations in registry entries.
• Accidental removal of the RDF extension description from the Windows registry
• Incomplete installation of an application that supports the RDF format
• The RDF file which is being opened is infected with an undesirable malware.
• There is too little space on your computer to open the RDF file.
• Drivers for the equipment used by the computer to open an RDF file are out of date.

If you are sure that all of the above reasons are not present in your case (or have already been excluded), the RDF file should work with your programs without any problems. If the problem with the RDF file is still not resolved, this may mean that in this case there is another, rare problem with the RDF file. In this case, the only thing left is the help of a specialist.

How to associate a file with an installed program?

If you want to associate a file with a new program (eg moj-plik.RDF) you have two options. The first and easiest one is to right-click on the selected RDF file. From the open menu, select the option Select default program", then option "Revise" and find the required program. The entire operation must be confirmed by pressing the OK button.

Is there a universal method for opening unknown files?

Many files contain data in the form of text or numbers. It is possible that while opening unknown files (e.g. RDF), a simple text editor popular in Windows, which is Notatnik will allow us to see part of the data encoded in the file. This method allows you to view the contents of many files, but not in the same form as the program designed to serve them.

We hope we helped you resolve your RDF file problem. If you don't know where you can download an application from our list, click on the link (this is the name of the program) - You will find more detailed information on where to download the secure installation version of the required application.

What else could cause problems?

There may be more reasons why you cannot open an RDF file (not just the lack of an appropriate application).
Firstly- the RDF file may be incorrectly linked (incompatible) with the application installed to support it. In this case, you need to change this connection yourself. To do this, right-click on the RDF file you want to edit, click the option "To open with" and then select the program you installed from the list. After this action, problems with opening the RDF file should completely disappear.
Secondly- the file you want to open may simply be damaged. In this case, it would be best to find a new version of it, or download it again from the same source (perhaps for some reason in the previous session the download of the RDF file did not finish and it could not be opened correctly).

Do you want to help?

If you have additional information about the RDF file extension, we would be grateful if you share it with users of our site. Use the form below and send us your information about the RDF file.

File extension.rdf(Resource Description Framework File)

Programs that use this extension: .rdf

File extension.rdf(Report Definition File)

Programs that use this extension: .rdf

Programs that use this extension: .rdf

Programs that use this extension: .rdf

When visiting our website, you probably asked yourself one of the following questions:

• What program can you use to open the .rdf file?
• How to open a .rdf file?
• What kind of file is this - .rdf?
• How to convert a .rdf file?
• Where can I find information about the .rdf file?

Resource Description Framework (RDF, “Resource Description Framework”) is a model developed by the World Wide Web Consortium for representing data, especially metadata. RDF represents statements O resources in a form suitable for machine processing. RDF is part of the Semantic Web concept.

A resource in RDF can be any entity - either informational (for example, a website or an image) or non-informational (for example, a person, a city, or some abstract concept). The statement made about a resource has the form “subject - predicate - object” and is called triplet . The statement “the sky is blue” in RDF terminology can be represented as follows: the subject is “the sky”, the predicate is “has color”, the object is “blue”. URIs are used to represent subjects, relationships, and objects in RDF.

RDF triplet

A set of RDF statements forms a directed graph, in which the vertices are subjects and objects, and the edges represent relationships.

Story

The history of RDF dates back to 1990, when Tim Berners-Lee proposed marking the types of links between documents to facilitate automatic processing. Link types were not included in the first HTML specification, however, but the idea was picked up in the MCF metadata description system. A generalized representation of metadata was reflected in the W3C recommendation for RDF in 1999. Since then, RDF standards have evolved, and new tools for working with RDF have appeared.

Set of standards

• 2015:
  • Linked Data Platform 1.0(English) - Introduction to Linked Data, a description of proposed approaches to using RDF on the Internet.
  • RDFa representation format
    • RDFa Core 1.1 - Third Edition(English) - Description of the basic syntax "RDFa" for RDF 1.1
    • RDFa Lite 1.1 - Second Edition(English) - Description of the lightweight syntax "RDFa Lite" for RDF 1.1
    • HTML+RDFa 1.1 - Second Edition(English) - Features of the “RDFa” syntax in HTML for RDF 1.1
    • XHTML+RDFa 1.1 - Third Edition(English) - Features of the “RDFa” syntax in XHTML for RDF 1.1
• year 2014:
  • RDF 1.1 data model:
    • RDF 1.1 Concepts and Abstract Syntax(English) - Concepts and abstract syntax of RDF 1.1
    • RDF Schema 1.1(English) - RDF Dictionary 1.1
    • RDF 1.1 Semantics(English) - Semantics of RDF 1.1
  • Presentation formats:
    • RDF 1.1 XML Syntax(English) - Description of the “RDF/XML” syntax for RDF 1.1
    • RDF 1.1 Turtle(English) - Description of the "Turtle" syntax for RDF 1.1
    • RDF 1.1 N-Triples(English) - Description of the “N-Triples” syntax for RDF 1.1
    • RDF 1.1 N-Quads(English) - Description of the “N-Quads” syntax for RDF 1.1
    • RDF 1.1 TriG(English) - Description of the "TriG" syntax for RDF 1.1
    • JSON-LD 1.0(English) - Description of the “JSON-LD” syntax, representation of RDF data in JSON format
    • JSON-LD 1.0 Processing Algorithms and API(English) - Description of processing algorithms and their APIs for RDF data presented in the form of “JSON-LD”
  • Applied dictionaries and ontologies
    • Data Catalog Vocabulary (DCAT)(English) - an ontology of concepts in the field of describing a catalog of information published on the Internet and the data sets it contains
    • The RDF Data Cube Vocabulary(English) - ontology of concepts in the field of description of multidimensional data sets
    • The Organization Ontology(English) - ontology of concepts in the field of describing the structure of organizations
• year 2013:
  • Rule Interchange Format
    • RIF RDF and OWL Compatibility (Second Edition)(English) - using the W3C recommended approach to describing and executing rules with RDF
  • Related standards
    • Internationalization Tag Set (ITS) Version 2.0(English)
• year 2012:
  • rdf:PlainLiteral: A Datatype for RDF Plain Literals (Second Edition)(English)
  • Reflecting relational data in RDF:
    • A Direct Mapping of Relational Data to RDF(English) - direct
    • R2RML: RDB to RDF Mapping Language(English) - flexible
    • Use Cases and Requirements for Mapping Relational Databases to RDF(English) - initial application examples and requirements, 2010
  • (English) - ontology for describing media resources
• 2008:
• 2004:
  • (English) - Concepts and abstract syntax of RDF 1.0
  • RDF Semantics(English) - Semantics of RDF 1.0
  • RDF Test Cases(English) - RDF test data set
  • RDF Primer(English) - Introduction to RDF

There are also many drafts and notes, including Linked Data Glossary(English) - glossary of all concepts related to RDF.

Presentation Formats

Several formats are used to record and transmit RDF, including:

Semantics

RDF provides tools for building information models, but does not deal with the semantics of what is being described. Taken in isolation, an RDF graph can only be understood as a graph. Interpretation of meaning is based on the ability of RDF users to interpret individual URIs, string literals, and graph structure, and from these to interpret other URIs and data semantics.

To express semantics it is required dictionaries(English vocabularies), taxonomy(English taxonomies) and ontologies (English ontologies) and the presence of connections with them in the graph under consideration.

• A dictionary is a collection of terms that have the same meaning in all contexts of use of this dictionary.

• Taxonomy is dictionary hierarchically organized terms.

• The ontology uses a predefined reserved dictionary terms to define concepts and relationships between them for a specific subject area. Ontologies can be used to express the semantics of vocabulary terms, their relationships, and contexts of use.

Most dictionaries for the described subjects not only contain predicates and objects, but also imply for them one or another semantic load, which usually does not fit into the actual RDF representation of the dictionary. These may be ways of using certain specific subjects, rules, restrictions, recommendations, justification for the need to use them, etc. As a rule, this is described in the accompanying documentation for the dictionary.

RDF Schema

RDF Schema provides a vocabulary for RDF that is primarily used to describe other vocabularies. RDF Schema:

• declares the existence of resources, among which it separately identifies literals of different data types, including strings indicating the language, strings with XML or HTML markup;
• declares the existence of resource classes and their subclasses;
• declares the existence of properties that relate to resources of a certain class, may have resources of specific classes as objects, and may be a more narrowly conceived version of a more general property;
• declares the existence of such frequently used properties as “name”, “description”, “resource-synonym”, and some others;
• describes classes and properties that allow you to organize three types of lists in the RDF model;
• describes the classes and properties needed for reification (from the English reification, embodiment) - providing the ability to write triplets, the object and subject of which are triplets.

A description of the additional semantic load of this dictionary is located in all three main RDF standards - in the description of RDF concepts (English), in the description of the dictionary itself (English), and in the description of RDF semantics (English).

In particular, the description of RDF semantics states that dictionaries can only imply, but not explicitly contain, triplets, which can be obtained from the remaining triplets of the dictionary by executing a number of formal rules defined for the dictionary, resulting from the semantics of the concepts used by the dictionary. And a list of rules implied by the RDF Schema dictionary is provided.

OWL

To record more complex logical relationships of the described resources of various subject areas in ontologies, the OWL language is used.

RDF storage

There are two main types of storage used to store RDF data: specialized (native, “native”, “native”) and not specialized (non-native). Specialized repositories allow for a greater degree of optimization, but are more labor-intensive to design, since they are built specifically for working with RDF. Other storage facilities are simpler to design (for example, through the use of relational DBMS mechanisms or NoSQL solutions), but are less optimized for working with RDF. Specialized storages are divided according to their ability to operate with data that is located entirely in RAM (in-memory) or can also use external memory (for example, a hard drive).

RDF systems are being developed for both research and production use. The main specialized storage facilities suitable for production use include:

• OpenLink Virtuoso
• Stardog
• Blazegraph (formerly Bigdata)
• GraphDB (formerly OWLIM)
• RDF4J (formerly Sesame)
• Apache Jena
• Allegrograph
• 4Store

Application

Design of knowledge bases or presentation of their data within the framework of various projects in many institutes, universities and other organizations. Mainly for research purposes.

Search engines encourage webmasters to use RDF and similar page markup languages ​​to improve the information content of links to their site in search results.

The RDF format can have several main modifications:

• RDF extension (full) Resource Description Framework) is a platform for describing web resources. The main area of ​​practical application of this format is the presentation of data about resources on the Web. Contains a set of structured data, including metadata, site map, update log information, description of individual site pages, keywords.

The key standard with which the RDF model representation is implemented is W3C.

The main goal of developing the RDF extension was to create a unified (universal) syntax for the language for describing the entire variety of Internet resources. It combines , and N3 data presentation formats, as well as RSS and FOAF Internet technologies.

To save settings and interface configuration, the RDF file can be actively used by various browsers, for example, Firefox.

• An RDF file is the result of generation by PowerProducer, a commercial software product (developed by CyberLink) widely used for processing digital video content and recording it directly onto optical media.

RDF is a file compressed using a certain technology, which is a disk image. The extension cannot be opened with any other utility except PowerProducer.

• The RDF extension can also be associated with one of the components of the computer-aided design (CAD) system ReluxCAD - a complex specifically designed for modeling light sources as components of holistic lighting systems. Positioning, brightness, basic technical characteristics - this is just the smallest list of fundamental parameters that an RDF file can include. The RDF format is often used in conjunction with and formats that are “native” to CAD AutoCAD.
• RDF extension is a report file in ArcGIS, a standardized statistical accounting system used by various GIS solutions. An RDF file is a structured set of data in the form of digital tables. ArcGIS reports are generated in a special software module Report Designer. To view such information, you can use the Report Viewer component.
• RDF format (full) Oracle Report Definition File) can act as a large-format report table used in the Oracle DBMS. By its structure, an RDF file represents a set of data containing various SQL queries necessary to actually generate a report and process it in one of the universal formats (, etc.).

Programs for opening RDF files

Depending on its practical purpose and specific modification, an RDF extension can be generated and opened for editing using the following software packages:

For cases where the RDF file is a platform for describing web resources, you can use the following software utilities:

• Windows OS uses Altova XMLSpy, Mozilla SeaMonkey, Firefox, Liquid Technologies Liquid XML Studio and SyncRO Soft oXygen XML Editor;
• on Mac OS RDF will be available using the same software plugins Mozilla SeaMonkey and SyncRO Soft oXygen XML Editor.

It is noteworthy that the extension is also adapted for use on the Linux platform using the Firefox Internet browser.

When an RDF file is used to process digital video content and record directly to optical disk, the CyberLink PowerProducer 5.5 utility can be used.

If the RDF format is used as a component of a computer-aided design (CAD) system specifically designed for modeling light sources as components of complete lighting systems, then the ReluxCAD complex can be used to open the file.

For cases where the RDF extension is associated with a report file in ArcGIS (a standardized statistical accounting system used by various GIS solutions), the file can be reproduced using the Report Designer or Report Viewer software modules;

When the RDF format acts as a spreadsheet report used in a DBMS, it will be accessible using Oracle.

If an error occurs when playing the format: either the source file is damaged or infected, or the RDF file is opened using an incorrect software utility.

Convert RDF to other formats

Despite the fact that the RDF extension has a large number of different designs and modifications, its conversion to other formats is supported only in a number of cases, in particular:

• if the RDF extension acts as a project for modeling light sources as components of integral lighting systems, then the internal CAD translator ReluxCAD or can be used to convert it into or

  Why RDF and what are its advantages?

  We have to admit that although the RDF extension has a wide variety of different designs, it is by no means such a popular and in-demand format among ordinary users. However, the format may be in demand in several highly specialized areas. It is widely used as:

  • platforms for describing web resources;
  • digital video content file for direct recording directly onto optical media;
  • components of a computer-aided design (CAD) system specifically designed for modeling light sources as components of complete lighting systems;
  • report file in ArcGIS(standardized statistical accounting system used by various GIS solutions);
  • spreadsheet report used in the DBMS.