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Descriptor (other)
Descriptor may refer to: *An identifier Information technology * Short Payment Descriptor, a compact data format for an easy exchange of a payment information using modern electronic channels *Data descriptor, a software or hardware structure describing data * Visual descriptors, a representation of visual features in image or video * Security descriptor, a Windows data structure containing security information *Segment descriptor, used for memory addressing in x86 computer architectures *Index term, also known as a "descriptor" in information retrieval *File descriptor, an abstract key for accessing a file Chemistry * Molecular descriptor, which helps characterize a chemical compound * Descriptor (chemistry), a prefix used to specify a chemical name Other * Billing descriptor, the merchant's name that appears on a credit card statement See also * *Epithet An epithet (, ), also a byname, is a descriptive term (word or phrase) commonly accompanying or occurring in place of t ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Identifier
An identifier is a name that identifies (that is, labels the identity of) either a unique object or a unique ''class'' of objects, where the "object" or class may be an idea, person, physical countable object (or class thereof), or physical mass noun, noncountable substance (or class thereof). The abbreviation ID often refers to identity, identification (the process of identifying), or an identifier (that is, an instance of identification). An identifier may be a word, number, letter, symbol, or any combination of those. The words, numbers, letters, or symbols may follow an code, encoding system (wherein letters, digits, words, or symbols ''stand for'' [represent] ideas or longer names) or they may simply be arbitrary. When an identifier follows an encoding system, it is often referred to as a code or id code. For instance the ISO/IEC 11179 metadata registry standard defines a code as ''system of valid symbols that substitute for longer values'' in contrast to identifiers wi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Short Payment Descriptor
Short Payment Descriptor (SPAYD, SPD) is a compact data format for an easy exchange of payment information using modern electronic channels, such as smart phones or NFC devices. Usage Practically, the format is being deployed in the Czech Republic (where the format is an accepted unique standard for QR code payments) and the Slovak Republic, but the format can be technically used with any bank using IBAN account numbers. That includes currently the majority of European countries, some in the Middle East and a few others. History Development of the format started in May 2012 during the development of the mobile banking app for Raiffeisenbank a.s. (Czech branch of Raiffeisen Bank International) in cooperation with a technology company Inmite s.r.o. Originally, the format was intended for use for P2P Payments via a QR Code. Later, it was generalized for many other usages, such as NFC payments or online payments. The format was created as an open effort from the very beginni ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Data Descriptor
In computing, a data descriptor is a structure containing information that describes data. Data descriptors may be used in compilers, as a software structure at run time in languages like Ada or PL/I, or as a hardware structure in some computers such as Burroughs large systems with their descriptors. Data descriptors are typically used at run-time to pass argument information to called subroutines. OpenVMS and Multics have system-wide language-independent standards for argument descriptors. Descriptors are also used to hold information about data that is only fully known at run-time, such as a dynamically allocated array. Examples The following descriptor is used by IBM ''Enterprise PL/I'' to describe a character string: * 'desc type' is 2 to indicate that this is an element descriptor rather than an array or structure descriptor. * 'string type' indicates that this is a character or a bit string, with varying or non varying length. 2 indicates a non varying (fixed-length) ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Visual Descriptors
In computer vision, visual descriptors or image descriptors are descriptions of the visual features of the contents in images, videos, or algorithms or applications that produce such descriptions. They describe elementary characteristics such as the shape, the color, the texture or the motion, among others. Introduction As a result of the new communication technologies and the massive use of Internet in our society, the amount of audio-visual information available in digital format is increasing considerably. Therefore, it has been necessary to design some systems that allow us to describe the content of several types of multimedia information in order to search and classify them. The audio-visual descriptors are in charge of the contents description. These descriptors have a good knowledge of the objects and events found in a video, image or audio and they allow the quick and efficient searches of the audio-visual content. This system can be compared to the search engines for t ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Segment Descriptor
In memory addressing for Intel x86 computer architectures, segment descriptors are a part of the segmentation unit, used for translating a logical address to a linear address. Segment descriptors describe the memory segment referred to in the logical address. The segment descriptor (8 bytes long in 80286 and later) contains the following fields: # A segment base address # The segment limit which specifies the segment size # Access rights byte containing the protection mechanism information # Control bits Structure The x86 and x86-64 segment descriptor has the following form: : What the fields stand for: ; Base Address : Starting memory address of the segment. Its length is 32 bits and it is created from the lower part bits 16 to 31, and the upper part bits 0 to 7, followed by bits 24 to 31. ; Segment Limit : Its length is 20 bits and is created from the lower part bits 0 to 15 and the upper part bits 16 to 19. It defines the address of the last accessible data. The length i ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Index Term
In information retrieval, an index term (also known as subject term, subject heading, descriptor, or keyword) is a term that captures the essence of the topic of a document. Index terms make up a controlled vocabulary for use in bibliographic records. They are an integral part of bibliographic control, which is the function by which libraries collect, organize and disseminate documents. They are used as keywords to retrieve documents in an information system, for instance, a catalog or a search engine. A popular form of keywords on the web are tag (metadata), tags, which are directly visible and can be assigned by non-experts. Index terms can consist of a word, phrase, or alphanumerical term. They are created by analyzing the document either manually with subject indexing or automatically with Index (search engine), automatic indexing or more sophisticated methods of keyword extraction. Index terms can either come from a controlled vocabulary or be freely assigned. Keywords are sto ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
File Descriptor
In Unix and Unix-like computer operating systems, a file descriptor (FD, less frequently fildes) is a process-unique identifier (handle) for a file or other input/output resource, such as a pipe or network socket. File descriptors typically have non-negative integer values, with negative values being reserved to indicate "no value" or error conditions. File descriptors are a part of the POSIX API. Each Unix process (except perhaps daemons) should have three standard POSIX file descriptors, corresponding to the three standard streams: Overview In the traditional implementation of Unix, file descriptors index into a per-process maintained by the kernel, that in turn indexes into a system-wide table of files opened by all processes, called the . This table records the ''mode'' with which the file (or other resource) has been opened: for reading, writing, appending, and possibly other modes. It also indexes into a third table called the inode table that describes the ac ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Molecular Descriptor
Molecular descriptors play a fundamental role in chemistry, pharmaceutical sciences, environmental protection policy, and health researches, as well as in quality control, being the way molecules, thought of as real bodies, are transformed into numbers, allowing some mathematical treatment of the chemical information contained in the molecule. This was defined by Todeschini and Consonni as: "''The molecular descriptor is the final result of a logic and mathematical procedure which transforms chemical information encoded within a symbolic representation of a molecule into a useful number or the result of some standardized experiment.''" By this definition, the molecular descriptors are divided into two main categories: experimental measurements, such as log P, molar refractivity, dipole moment, polarizability, and, in general, additive physico-chemical properties, and theoretical molecular descriptors, which are derived from a symbolic representation of the molecule and can be fur ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Billing Descriptor
A billing descriptor refers to how a company's name appears on a credit card statement and is established when the merchant account is created. It is intended for credit card customers to identify the recipient of a payment for a specific transaction. Typically, the billing descriptor uses the business's trading name rather than its legal name to ensure easy recognition by the customer. In some cases, a soft or dynamic descriptor may be used, incorporating the name of the service provided. This approach is commonly employed by large companies offering multiple services, where the service brand is more familiar to customers than the company's name itself. Choosing a clear billing descriptor is crucial for merchants to prevent chargebacks, as it helps customers recognize and associate the transaction with the intended recipient. Static descriptors If the company provides a single service or product, a simple billing descriptor like "ZXC Services & Products 800-123-4567" is typica ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
