Fully qualified name

Fully qualified name

In computer programming, a fully qualified name is an unambiguous name that specifies which object, function, or variable a call refers to absolutely. To fully-qualify most often means to explicitly refer to namespaces that would otherwise be implicit because of the scope of the call. While always done to eliminate ambiguity, this can mean numerous things largely dependent on context:
* In the sense of SQL it might mean to explicitly mention the database and schema: -- Not "SELECT * FROM table" SELECT * FROM database.schema.table
* In the sense of Perl a fully qualified scalar is listed as: # Not "print $scalar" print $main::scalar # Where main is the package of $scalar
* In the sense of a traditional Unix pathname: # Not "sh ./foo/bar/baz.sh" in /home/user/quz (relative pathname) sh /home/user/quz/foo/bar/baz.sh
* In the sense of intranet's IP address it might refer to an explicit network portion of the address in combination with the host portion as fully qualified.
* In the sense of domain name the domain name is explicitly suffixed with a dot, to eliminate the step of resolving, and to ensure that no additional suffix is added. See FQDN for more information. # Not "wikipedia.com" wikipedia.com.
* Lastly, an example in the style of Wikipedia, how to qualify the Wikimedia project (Wikipedia), and the language (English): Wikipedia
* In XML, a qualified name (QName) is the name of an XML element disambiguated using the XML namespace. For example, Element Value

To distinguish a fully qualified name from a regular name, C++, Tcl, and Perl use two colons (::), and Java uses dots (.). In Java, ActionScript (programming language used by Adobe Flash programmers), and other object-oriented languages the use of the dot is known as "dot syntax". Another example is the fully qualified domain name.


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Look at other dictionaries:

  • Fully qualified file name — The term fully qualified file name means a file on a computer whose exact name is completely specified such that it is unambiguous and cannot be mistaken for any other file on that system. It is somewhat equivalent on the Internet to a URL… …   Wikipedia

  • Fully Qualified Domain Name — Un fully qualified domain name (ou FQDN) est un nom de domaine non ambigu pour spécifier la position absolue d un nœud dans un arbre Domain Name System (DNS). Pour distinguer un FQDN d un Domain Name System, on ajoute un préfixe avant celui ci.… …   Wikipédia en Français

  • Fully Qualified Domain Name —   [Abk. FQDN, dt. »vollständig angegebener Domänenname«], die Langform des Namens, der den Pfad zu einem Host im Internet beschreibt, z. B. »http://www.wgv net.de«. Dabei ist »http://« der angeforderte Dienst, »www« ist der Rechner, »wgv net« die …   Universal-Lexikon

  • Fully qualified domain name — A fully qualified domain name (or FQDN) is an unambiguous domain name that specifies the exact location in the Domain Name System s tree hierarchy through to a top level domain and finally to the root domain. Technically, a FQDN has a trailing… …   Wikipedia

  • Fully Qualified Domain Name — schematische Darstellung der DNS Hierarchie Eine Domain (auch Domäne) ist ein Namensraum, der zusammen mit dem Hostnamen dazu dient Computer im Internet zu identifizieren, und ist unter anderem Bestandteil der URL einer Webseite, wie z. B.… …   Deutsch Wikipedia

  • Fully-Qualified Host Name — Ein Fully Qualified Host Name (kurz FQHN, deutsch „vollständig angegebener Rechnername“) ist ein Hostname, der entweder als vollqualifizierter Name einer Domain (Fully Qualified Domain Name, FQDN) dargestellt wird oder als numerische IP Adresse… …   Deutsch Wikipedia

  • Fully qualified domain name — Dans le DNS, un fully qualified domain name (FQDN, ou nom de domaine complètement qualifié) est un nom de domaine qui indique la position absolue d un nœud dans l arborescence DNS en indiquant tous les domaines de niveau supérieur jusqu à la… …   Wikipédia en Français

  • fully qualified domain name —    A host name with the appropriate domain name appended.Forexample,onahostwiththehost name wallaby and the Domain Name Service (DNS) domain name my company.com, the fully qualified domain name becomes wallaby.my company.com.    See also Domain… …   Dictionary of networking

  • Fully qualified domain address — FQDA (Fully Qualified Domain Address) is a string forming the Internet e mail address comprising the local part, symbol @ and the domain name (e.g. bob@b.org). The local part usually denotes the username, while the domain name is used by Mail… …   Wikipedia

  • fully qualified hostname — noun an Internet domain name that identifies a computer …   Wiktionary

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