Mergefrom Identifier metadata date January 2009 File Louvre identifiers Ma1274 MR242.jpg thumb right 220px Identifiers on the back of a statue in the Louvre An identifier is a unique expression in a written format either by a Code disambiguation code , by numbers or by the combination of both to distinguish variations from one to another among a class of substances, items, or objects. For living organism ... name language entities. Some of the kinds of entities an identifier might denote include variable programming ... of an identifier but are known as Keyword computer programming keywords . In a few languages, e.g., PL ... may appear in an identifier. For example, in early versions of the C programming language C and C ... other modern languages support almost all Unicode characters in an identifier a common restriction ... rather than the textual identifier tokens these memory addresses, or offsets, having been assigned by the compiler to each identifier . Implementations of programming languages that offer interactive ... not usually assign any semantic meaning to an identifier based on the actual character sequence used ... Immutable object immutable if its identifier starts with a capital letter. In Fortran , the first ... point variable. Advantages of the application Due to the uniqueness of an identifier, the confusions ... CAS registry number CODEN Digital object identifier E number EC number Global Trade Item Number Group identifier International Chemical Identifier International Standard Book Number International ... batch number Serial Item and Contribution Identifier Serial number Service batch number Tax File ... Diagnosis codes Document management system Food labeling regulations Gene nomenclature Identifier ... code Systematized Nomenclature of Medicine Uniform Resource Identifier Unique identifier col 2 ... identifier col end Category Identifiers Category Computer programming be cs Identifik tor de Bezeichner es Identificador fr Identificateur ko it Identificatore nl Identifier ... more details
Unreferenced date December 2009 Mergeto Identifier date January 2009 In metadata , an identifier is a language independent label, sign or token that uniquely identifies an object within an identification scheme . The suffix identifier is also used as a representation term when naming a data element . See also Metadata Data element Identifier Representation term DEFAULTSORT Identifier Metadata Category Metadata ... more details
unreferenced date April 2007 A system identifier is a document processing construct introduced in the HyTime markup language as a supplement to SGML . It was subsequently incorporated into the HTML and XML markup language s. In HyTime, there are two kinds of system identifier formal system identifier FSI and simple system identifier . In HTML and XML, a system identifier is a fragmentless Uniform Resource Identifier URI reference . It typically occurs in a Document Type Declaration . In this context, it is intended to identify a document type which is used exclusively in one application, whereas a public identifier is meant to identify a document type that may span more than one application. In the following example, the system identifier is the text contained within quotes code < DOCTYPE html SYSTEM nowiki http www.w3.org TR xhtml1 DTD xhtml1 transitional.dtd nowiki code compu lang stub Category Markup languages Category computing terminology ... more details
Merge to Reserved word discuss Talk Reserved identifier date February 2010 Unreferenced auto yes date December 2009 A reserved identifier is an element of computer programming languages that is a fixed part of the language or operating system and may not be redefined by the programmer. In the C programming language C language , all names that begin with one or two leading underscores are reserved in certain contexts. Citation needed date January 2008 Category Programming constructs DEFAULTSORT Reserved Identifier Compu lang stub ... more details
unreferenced date November 2010 A public identifier is a document processing construct in SGML and XML . In HTML and XML, a public identifier is meant to be universally unique within its application scope. It typically occurs in a Document Type Declaration . A public identifier is meant to identify a document type that may span more than one application. A system identifier is meant for a document type that is used exclusively in one application. In the following Document Type Declaration, the public identifier is code W3C DTD XHTML 1.0 Transitional EN code code < DOCTYPE html PUBLIC W3C DTD XHTML 1.0 Transitional EN nowiki http www.w3.org TR xhtml1 DTD xhtml1 transitional.dtd nowiki code compu lang stub Category Markup languages ... more details
Unreferenced date December 2009 Unix like operating system s identify users within the kernel computing kernel by an unsigned integer value called a user identifier , often abbreviated to UID or User ID . The range of UID values varies amongst different systems at the very least, a UID represents a 15 bit integer, ranging between 0 and 32767, with the following restrictions The superuser must always have a UID of zero 0 . The user nobody username nobody traditionally got the largest possible UID as the opposite of the Superuser 32767. More recently, systems have assigned the user a UID in the system range 1&ndash 100, see below or in the range 65530 65535. Convention reserves UIDs from 1 to 100 for system use some manuals recommend reserving UIDs from 101 up to 499 Red Hat Enterprise Linux or even up to 999 Debian as well. The UID value references users in the etc passwd file. Shadow password files and Network Information Service also refer to numeric UIDs. The user identifier has become a necessary component of Unix file system s and Process computing processes . Some operating systems support 16 bit UIDs, making 65536 unique IDs possible a modern system with 32 bit UIDs will potentially make 4,294,967,296 2 sup 32 sup distinct values available. In POSIX compliant environments the commandline command Id Unix id gives the users user identifier number as well as more information on the user account like the user name , primary user group and group identifier GID . See also Setuid Sticky bit Process identifier Inode File system permissions DEFAULTSORT User Identifier Category Unix de Benutzerkennung es UID fr User identifier it User identifier ja pl Identyfikator u ytkownika ru Unix ... more details
In computing , an object identifier or OID is an identifier used to name an object computer science object compare Uniform Resource Name URN . Structurally, an OID consists of a node graph theory node in a hierarchically assigned Namespace computer science namespace , formally defined using the ITU T s Abstract syntax notation one ASN.1 standard. Successive numbers of the nodes, starting at the root of the tree, identify each node in the tree. Designers set up new nodes by registering them under the node s registration authority. The root of the tree contains the following three directed edge arc s 0 ITU T 1 ISO 2 joint iso itu t Usage In computer security , OIDs serve to name almost every object type in X.509 Public key certificate certificates , such as components of Distinguished Name s, Certificate Policy Statement CPS s, etc. Within X.500 directory schemas and protocols, to uniquely name each attribute type and object class, and other elements of schema. Within Lightweight Directory Access Protocol LDAP logical schema schemas , each object class and each attribute type has a unique ... Network Management Protocol SNMP , consists of the object identifier for an object in a Management ... UID Unique IDentifier in place of OID. The IANA OID registry contains a list of registered entities ... object identifier LSID International Geo Sample Number Surrogate key Extended Validation Certificate Universally Unique Identifier Globally Unique Identifier Uniform Resource Name Persistent Object Identifier In computer programming , an object identifier generally takes the form of an implementation ... system. OBJREF s have an object identifier OID field. External links http www.oid info.com Object Identifier Repository http www.alvestrand.no objectid Harald Tveit Alvestrand s Object Identifier Registry http pen.iana.org IANA Private Enterprise Numbers FOLDOC Category Identifiers Category Network management de Object Identifier fr OID pl OID fi OID ... more details
A location identifier is a symbolic representation for the name and the location of an airport , navigation navigation aid , or weather station , and is used for manned air traffic control facilities in air traffic control , telecommunications, computer programming, weather reports, and related services. ICAO location indicator See International Civil Aviation Organization airport code The International Civil Aviation Organization establishes sets of 4 letter location indicators which are published ... and KCEF for Westover Joint Air Reserve Base . IATA identifier See International Air Transport ... such as MNL for Manila Ninoy Aquino Airport. In the United States, the IATA identifier usually equals the FAA identifier, but this is not always the case. A prominent example is Sawyer International Airport , Michigan, which uses the FAA identifier SAW and the IATA identifier MQT. FAA identifier The Federal Aviation Administration identifier is a three letter or four letter alphanumeric code identifying ... Chicago Airport and 0B5 for Turners Falls Airport . Private airfields have a four letter identifier ... for identifiers in the three letter series. In this identifier series, the number is always ..., or last two positions of the four character code. The use of the FAA identifier system in meteorology ... is dependent wholly on the ICAO identifier system. Transport Canada identifier Transport Canada assigns ... Y and Z, for its areas of jurisdiction. These identifiers are designed to mesh with the FAA Identifier ... and units that have requested, but not yet received a permanent location identifier. One system ... identifier but adds an extra digit, allowing many more stations to be indexed. This extra digit is always 0 when referencing an actual WMO station using the 5 digit identifier, but may be 1..9 to reference ..., such as Stone Mountain Airport , whose identifier 00A is now used for an R C heliport in Bensalem ... Category Airport terminology es Location identifier fa sv Location identifier ... more details
In computer hypertext , a fragment identifier is a short Character string computer science string of character computing character s that refers to a resource computer science resource that is subordinate to another, primary resource. The primary resource is identified by a Uniform Resource Identifier URI , and the fragment identifier points to the subordinate resource. Typically, the fragment identifier is appended to the Uniform Resource Locator URL, a type of URI for a hypertext document and is meant to identify a portion of that document. A fragment identifier is defined by RFC 3986 as an optional component of a URI reference , and it must conform to a certain syntax. The syntax requires that the fragment identifier be separated from the rest of the URI reference by a code code number sign character. The separator is not considered part of the fragment identifier. Examples In Hypertext Markup Language HTML applications, code nowiki http www.foo.org foo.html nowiki bar code refers to the element with the code id code attribute that has the value code bar code i.e., code id bar code in the document identified by the URI code nowiki http www.foo.org foo.html nowiki code , which is typically ..., the fragment identifier in the URI code nowiki http www.foo.org foo.xml nowiki xpointer ... language Python Package Index appends the MD5 hash of a file to the URL as a fragment identifier ... a fragment identifier for text plain documents, based on character and line positions and ranges .... A text search fragment identifier with fragment specification scheme id code words code is the first ... identifier for searching, of the form code s search terms code . The exclamation point is illegal in anchor ... The fragment identifier functions differently than the rest of the URI namely, its processing is exclusively ... . In JavaScript , the fragment identifier of the current page can be accessed in the hash property ... identifier semantics RFC 2396 4.1. Fragment Identifier obsolete RFC 3986 3.5. Fragment W3C http www.w3.org ... more details
In the context of the Microsoft Windows NT line of operating system s, a Security Identifier commonly abbreviated SID is a unique name an alphanumeric character string which is assigned by a Windows Domain controller during the log on process that is used to identify a subject, such as a user or a group of users in a network of NT 2000 systems. Overview Windows grants or denies access and privileges to resources based on access control list s ACLs , which use SIDs to uniquely identify users and their group memberships. When a user logs into a computer, an access token is generated that contains user and group SIDs and user privilege level. When a user requests access to a resource, the access token is checked against the ACL to permit or deny particular action on a particular object. SIDs are useful for troubleshooting issues with security audits, Windows server and domain migrations. The format of an SID can be illustrated using the following example S 1 5 21 3623811015 3361044348 30300820 1013 class wikitable border 1 S 1 5 21 3623811015 3361044348 30300820 1013 The string is a SID. The revision level the version of the SID specification . The identifier authority value. domain or local computer identifier a Relative ID RID . Any group or user that is not created by default will have a Relative ID of 1000 or greater. Possible identifier authority values are 0 Null Authority 1 World Authority 2 Local Authority 3 Creator Authority 4 Non unique Authority 5 NT Authority 9 Resource Manager Authority ref See Custom Principals section on http msdn.microsoft.com en us library aa480244.aspx ... Access Control DAC Globally Unique Identifier GUID Mandatory Access Control MAC Role Based Access ... with a Security Identifier http www.microsoft.com technet sysinternals utilities newsid.mspx NewSID ... Category Universal identifiers Category Windows NT architecture ca Security Identifier de Security Identifier fr Security Identifier ko id Security Identifier ja pl Security Identifier ... more details
In computing , the process identifier normally referred to as the process ID or just PID is a number used by some operating system kernel computers kernel s such as that of Unix UNIX , Mac OS X or Microsoft Windows to temporarily uniquely identify a computer process process . This number may be used as a parameter in various function calls allowing processes to be manipulated, such as adjusting the process s priority or kill command killing it altogether. In Unix like operating systems, new processes are created by the code Fork operating system fork code system call . The PID is returned to the parent process parent enabling it to refer to the child in further function calls. The parent may, for example, wait for the child to terminate with the code waitpid code function, or terminate the process with code kill code . In Unix like operating systems, there are two tasks with specially distinguished process IDs swapper or sched has process ID 0 and is responsible for paging , and is actually part of the kernel rather than a normal user mode process. Process ID 1 is usually the init process primarily responsible for starting and shutting down the system. Originally, process ID 1 was not specifically reserved for init by any technical measures it simply had this ID as a natural consequence of being the first process invoked by the kernel. More recent Unix systems typically have additional kernel components visible as processes , in which case PID 1 is actively reserved for the init process to maintain consistency with older systems. Under Unix, process IDs are usually allocated on a sequential basis, beginning at 0 and rising to a maximum value which varies from system to system ... proc accessdate 2009 12 28 ref See also pidof User identifier Unix UID Group identifier Unix GID References Reflist FOLDOC DEFAULTSORT Process Identifier Category Process computing ca Identificador de proc s de Process identifier es Identificador de proceso eu Pid fr Identifiant de processus it PID ... more details
Orphan date November 2010 An international identifier is a number of different size which comes above or beside the national identification number and helps to identify a company over several countries in the world. The main tools used as a international identifiers are EasyNumber , DUNS number , International Suppliers Network and European Business Register Practical applications The use of international identifiers is relevant in a wide range of business functions Financial Department Consistent basis for risk assessment. Handling of corporate transparency issues. IT Department Data access improvement cross base access, cross base requests. Update of the different databases cleaning of duplicates, address maintenance. Sales Department Manage multi channel sales activities. Address updating. Prospect targeting. Marketing Department Access to up to date profile information. Removal of inactive companies. Basis for a portfolio analysis External links http www.ebr.org www.dnb.com http isn.icharter.org http ec.europa.eu internal market consultations docs 2009 interconnection of business registers working document en.pdf Category Identifiers Category Universal identifiers ... more details
Unreferenced date December 2009 Context date October 2009 Personal Identifiers also known as PID are a subset of personally identifiable information PII data element s that identify a unique individual and can permit another person to assume that individual s identity without their knowledge or consent. This can occur when PID data elements are use alone combined with a person s name, combined with other PID data elements OR combined with other PII Examples of PID Examples provided only as guidance, there may be others used in your location and they may vary by country or region. Privately issued ID credentials Benefit plan participation number Private health care authorization, access, or identification number Transactional financial account numbers Bank account number Credit debit card account number Personal identification number PIN Biometric identifiers Fingerprint voiceprint Iris retinal scan s DNA Health or medical information National Health certificate number Electronic identification credentials Digital certificates Password s Full Date of Birth Month, day and year European defined sensitive data Treated as PID globally, not just for citizens of the EU Racial or ethnic origin Political opinions Religious or philosophical beliefs Trade union membership Health or sex life Offenses, criminal convictions, or security measures Proceedings from crimes or offenses See also Identity score DEFAULTSORT Personal Identifier Category Personal life Category Personal identification documents Category Privacy ... more details
Unreferenced auto yes date December 2009 Orphan date December 2009 A World Parts Manufacturer Identifier WPMI code is a code used to unique identifier uniquely identify manufacturers of vehicle parts in the global automotive industry. It is defined by ISO 4100. It is the parts manufacturer analogue to Vehicle Identification Number World Manufacturer Identifier VIN s World Manufacturer Identifier . Unlike VIN numbers however, WPMI codes aren t intended to uniquely identify each part, merely to identify the manufacturer. Category Identifiers Automotive tech stub ... more details
The Identifier Locator Network Protocol is a network protocol designed to separate the two functions of network address es, the identification of network endpoint s, and assisting routing by providing topological information. See also Locator Identifier Separation Protocol External links http ilnp.cs.st andrews.ac.uk compu network stub Category Internet architecture Category Multihoming ... more details
Unreferenced date March 2007 Unique Feature Identifier is a geocode used for City cities , town s, village s, and other geographic feature s. Category Geocodes Cartography stub ... more details
Unreferenced date August 2008 Virtual Path Identifier VPI refers to an 8 bit user to network packets or 12 bit network network packets field within the header of an Asynchronous Transfer Mode packet. The VPI, together with the Virtual channel identifier VCI Virtual Channel Identifier is used to identify the next destination of a cell as it passes through a series of Asynchronous Transfer Mode ATM switches on its way to its destination. The VPI is useful for reducing the switching table of some virtual circuit s which have common paths. See also Virtual circuit identifier telecomm stub Category Data transmission TekSavvy website is the only place we ve seen this info so here s the Link below http teksavvy.com en support speedtouchsetup r.asp es Identificador de Ruta Virtual fr Virtual Path Identifier pt Identificador de rota virtual ru VPI ... more details
Context date March 2009 A Virtual Circuit Identifier VCI is a unique identifier which indicates a particular virtual circuit on a network. It is a 16 bit field in the header of an Asynchronous transfer mode ATM cell. The VCI, together with the Virtual Path Identifier VPI is used to identify the next destination of a cell as it passes through a series of ATM switches on its way to its destination. ATM switches use the VPI VCI fields to identify the Virtual Channel Link VCL of the next network that a cell needs to transit on its way to its final destination. The function of the VCI is similar to that of the data link connection identifier DLCI in frame relay and the Logical Channel Number & Logical Channel Group Number in X.25 . References Reflist Cisco Systems Multiband Switch and Service Configuration See also Virtual Path Identifier Asynchronous Transfer Mode Category Data transmission telecomm stub es Identificador de Canal Virtual fr Virtual Circuit Identifier it Virtual Circuit Identifier pt Identificador de circuito virtual ru VCI ... more details
The Book Item and Component Identifier , or BICI , is a draft standard of the United States National Information Standards Organization NISO that would provide a unique identifier for items or components within a book or publication to which an ISBN has been assigned. It is related to the Serial Item and Contribution Identifier . External websites http www.niso.org standards resources bici.html NISO page for BICI http www.niso.org pdfs BICI DS.pdf NISO draft standard for BICI http www.cendi.gov presentations ref link blixrud.ppt SICI and BICI Identifiers for Serials and Books Category Universal identifiers Library stub ... more details
On the Internet , the Internationalized Resource Identifier IRI is a generalization of the Uniform Resource Identifier URI . While URIs are limited to a subset of the ASCII character set, IRIs may contain characters from the Universal Character Set Unicode ISO 10646 , including Chinese or Japanese kanji , Korean alphabet Korean , Cyrillic alphabet Cyrillic characters, and so forth. It is defined by RFC 3987. Advantages There are reasons to see URIs displayed in different languages mostly, it makes it easier for users who are unfamiliar with the Latin A Z alphabet. Assuming that it isn t too difficult for anyone to replicate arbitrary Unicode on their keyboards, this can make the URI system more worldly and accessible. Disadvantages Mixing IRIs and ASCII Uniform Resource Identifier URI s can make it much easier to do phishing attacks that trick someone into believing they are on a site they really are not on. For example, one can replace the a in www. ebay .com or www. paypal .com with an internationalized look alike a character, and point that IRI to a malicious site. This is known as an IDN homograph attack . While a URI does not provide people with a way to specify Web resources using their own alphabets, an IRI does not make clear how Web resources can be accessed with keyboards that are not capable of generating the requisite internationalized characters. See also XRI Extensible Resource Identifier Internationalized domain name IDN Internationalized Domain Name Punycode External links http www.w3.org International W3C Internationalization Activity http annevankesteren.nl 2005 02 iri Anne van Kesteren s blog entry on IRI References references Categories Category Internet standards compu stub Interwikies de Internationalized Resource Identifier fr Internationalized Resource Identifier it Internationalized Resource Identifier ja Internationalized Resource Identifier pl Internationalized Resource Identifier pt IRI ru IRI scn Idintificaturi di Risorsi Intirnazziunalizzatu ... more details
In database design, a Persistent Object Identifier POID is a unique key unique identifier of a record on a table, used as the primary key . Important characteristics of a POID are that it does not carry business information and are not generally exported or otherwise made visible to data users as such a POID has many of the characteristics of a surrogate key . The only purpose of the POID is to act as the primary key on the table where it is defined and to be referenced as the foreign key by other tables. Because POIDs, like surrogate keys, do not carry business information, they are immune to changes in the form or meaning of business data. See also Natural key Primary key Surrogate key Unique key Object identifier External links http www.ibm.com developerworks websphere techjournal 0306 biernat biernat.html Persistent Object ID Service http blog.telemapics.com ?p 92 What is a Persistent Object Identifier and why should I care? http devnet.objectivity.com objects faq Persistent Object Category Database theory ... more details
A data link connection identifier DLCI is a Frame Relay 10 bit wide link local virtual circuit identifier used to assign frames to a specific Virtual circuit Permanent and switched virtual circuits in ATM.2C frame relay.2C and X.25 PVC or Virtual circuit Permanent and switched virtual circuits in ATM.2C frame relay.2C and X.25 SVC . Frame Relay networks use DLCIs to Statistical multiplexing statistically multiplex frames. DLCIs are preloaded into each switch and act as road signs to the traveling frames. ref cite web title DLCI s url http www.infocellar.com networks frame relay dlci.htm accessdate 22 March 2011 ref The standard allows the existence of 1024 DLCIs, however only numbers from 16 to 991 are available for end users equipment. The rest are reserved for various management purposes. ref cite web url http www.dcbnet.com notes framerly.html title What is Frame Relay accessdate 2007 09 18 ref References references Category Link protocols telecomm stub de Data Link Connection Identifier es Data Link Connection Identifier fr Data link connection identifier ... more details
An Organizationally Unique Identifier OUI is a 24 bit number that is purchased from the Institute of Electrical ... IEEE IEEE registration authority Registration Authority . This identifier uniquely identifies a vendor ... and effectively reserves a block of each possible type of derivative identifier such as MAC address ... that owns the OUI does set one of these bits when creating an identifier, then the value ... id , and e represents the digits of the extension identifier supplied by the organization to whom the OUI is registered. Types of Identifiers 32 bit Context Dependent Identifier CDI 32 The CDI 32 is an identifier that is formed by Concatenate concatenating the 24 bit OUI with an 8 bit extension identifier that is assigned by the organization that purchased the OUI the resulting identifier is generally ... 16 number as in FFFFFFFF sub 16 sub . 40 bit Context Dependent Identifier CDI 40 The CDI 40 is an identifier that is formed by concatenating the 24 bit OUI with a 16 bit extension identifier that is assigned by the organization that purchased the OUI the resulting identifier is generally represented ... as in FFFFFFFFFF sub 16 sub . 48 bit Media Access Control Identifier MAC 48 The IEEE now considers ... 48 identifier used to address hardware interfaces e.g., Network interface controller Network Interface ... in the field for this purpose i.e., this identifier is identical to the EUI 48 identifier and is an obsolete label for the same identifier, although some distinction is still made when encapsulating MAC 48 and EUI 48 identifiers within EUI 64 identifiers. ref name IEEE 48 bit Extended Unique Identifier EUI 48 The EUI 48 is an identifier that is formed by concatenating the 24 bit OUI with a 24 bit extension identifier that is assigned by the organization that purchased the OUI the resulting identifier is generally represented as a set of octets separated by dashes hexadecimal notation or colons ... coauthors title Guidelines for use of a 48 bit Extended Unique Identifier EUI 48 publisher IEEE date ... more details
A Formal Public Identifier FPI is a short piece of specially formatted text that may be used to uniquely identify a product, specification or document. One of their most common uses is as part of document type definitions, but they are also used in the vCard and iCalendar formats to identify the software product that has generated data. More recently, URI s and UUID s are usually used to uniquely identify objects. FPIs have become a legacy system . Syntax An example identifier code W3C DTD HTML 4.01 EN code can be broken down into two parts the owner identifier which indicates the issuer of the FPI, and the text identifier which indicates the particular document or object the FPI identifies ref http xml.coverpages.org tauber fpi.html ref . In the example, the owner identifier is code W3C code and the text identifier is code DTD HTML 4.01 EN code . The two parts are separated by a double Slash punctuation slash . Owner identifiers that are prefixed with code code indicate unregistered owners. W3C The W3C is notable for not having registered its FPI name. Registered identifiers are prefixed with code code and a small number of identifiers assigned by ISO do not require a prefix at all. Registered domain name s may be used as owner identifiers ref name ietf.org http www.ietf.org rfc rfc3151.txt ref . For example, the owner of code example.net code could issue FPIs using the owner identifier code IDN example.net code . Text identifiers can be broken down into the class , description and language . In this case the class is code DTD code , indicating that the FPI represents a document type definition the description is code HTML 4.01 code and the language is code EN code which ... the description is separated from the language using a double slash. The text identifier may optionally ... FPI Formal Public Identifier Web and XML Glossary& 93 Bot generated title ref The Formal Public Identifier ... fr Formal Public Identifier ... more details
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