pldb/PLDB huggingface dataset:
x86-64 (isa, appeared 2000)
Also known as: amd64 x86_64


x86-64 (also known as x64, x86_64, AMD64 and Intel 64) is the 64-bit version of the x86 instruction set. It introduces two new modes of operation, 64-bit mode and compatibility mode, along with a new 4-level paging mode. With 64-bit mode and the new paging mode, it supports vastly larger amounts of virtual memory and physical memory than is possible on its 32-bit predecessors, allowing programs to store larger amounts of data in memory. x86-64 also expands general-purpose registers to 64-bit, as well extends the number of them from 8 (some of which had limited or fixed functionality, e.g. for stack management) to 16 (fully general), and provides numerous other enhancements. Floating point operations are supported via mandatory SSE2-like instructions, and x87/MMX style registers are generally not used (but still available even in 64-bit mode); instead, a set of 32 vector registers, 128 bits each, is used. (Each can store one or two double-precision numbers or one to four single precision numbers, or various integer formats.) In 64-bit mode, instructions are modified to support 64-bit operands and 64-bit addressing mode. The compatibility mode allows 16- and 32-bit user applications to run unmodified coexisting with 64-bit applications if the 64-bit operating system supports them. As the full x86 16-bit and 32-bit instruction sets remain implemented in hardware without any intervening emulation, these older executables can run with little or no performance penalty, while newer or modified applications can take advantage of new features of the processor design to achieve performance improvements. Also, a processor supporting x86-64 still powers on in real mode for full backward compatibility. The original specification, created by AMD and released in 2000, has been implemented by AMD, Intel and VIA. The AMD K8 processor was the first to implement it. This was the first significant addition to the x86 architecture designed by a company other than Intel. Intel was forced to follow suit and introduced a modified NetBurst family which was software-compatible with AMD's specification. VIA Technologies introduced x86-64 in their VIA Isaiah architecture, with the VIA Nano. The x86-64 architecture is distinct from the Intel Itanium architecture (formerly IA-64), which is not compatible on the native instruction set level with the x86 architecture. Operating systems and applications written for one cannot be run on the other.
x86 Assembly (assembly, appeared 1972)
Also known as: x86


x86 assembly language is a family of backward-compatible assembly languages, which provide some level of compatibility all the way back to the Intel 8008 introduced in April 1972. x86 assembly languages are used to produce object code for the x86 class of processors. Like all assembly languages, it uses short mnemonics to represent the fundamental instructions that the CPU in a computer can understand and follow. Compilers sometimes produce assembly code as an intermediate step when translating a high level program into machine code.  Regarded as a programming language, assembly coding is machine-specific and low level. Assembly languages are more typically used for detailed and time critical applications such as small real-time embedded systems or operating system kernels and device drivers.
X86 (isa, appeared 1978)
Origin: Intel
Advanced Micro Devices


x86 is a family of backward-compatible instruction set architectures based on the Intel 8086 CPU and its Intel 8088 variant. The 8086 was introduced in 1978 as a fully 16-bit extension of Intel's 8-bit-based 8080 microprocessor, with memory segmentation as a solution for addressing more memory than can be covered by a plain 16-bit address. The term "x86" came into being because the names of several successors to Intel's 8086 processor end in "86", including the 80186, 80286, 80386 and 80486 processors. Many additions and extensions have been added to the x86 instruction set over the years, almost consistently with full backward compatibility. The architecture has been implemented in processors from Intel, Cyrix, AMD, VIA and many other companies; there are also open implementations, such as the Zet SoC platform. Nevertheless, of those, only Intel, AMD, and VIA hold x86 architectural licenses, and are producing modern 64-bit designs.The term is not synonymous with IBM PC compatibility, as this implies a multitude of other computer hardware; embedded systems, as well as general-purpose computers, used x86 chips before the PC-compatible market started, some of them before the IBM PC (1981) itself. As of 2018, the majority of personal computers and laptops sold are based on the x86 architecture, while other categories—especially high-volume mobile categories such as smartphones or tablets—are dominated by ARM; at the high end, x86 continues to dominate compute-intensive workstation and cloud computing segments.
XAML (xmlFormat, appeared 2008)


Extensible Application Markup Language (XAML  (listen)) is a declarative XML-based language developed by Microsoft that is used for initializing structured values and objects. It is available under Microsoft's Open Specification Promise. The acronym originally stood for Extensible Avalon Markup Language, Avalon being the code-name for Windows Presentation Foundation (WPF).XAML is used extensively in .NET Framework 3.0 & .NET Framework 4.0 technologies, particularly Windows Presentation Foundation (WPF), Silverlight, Windows Workflow Foundation (WF), Windows Runtime XAML Framework and Windows Store apps. In WPF, XAML forms a user interface markup language to define UI elements, data binding, events, and other features. In WF, workflows can be defined using XAML. XAML can also be used in Silverlight applications, Windows Phone apps and Windows Store apps. XAML elements map directly to Common Language Runtime object instances, while XAML attributes map to Common Language Runtime properties and events on those objects. XAML files can be created and edited with visual design tools like Microsoft Expression Blend, Microsoft Visual Studio, and the hostable Windows Workflow Foundation visual designer. They can also be created and edited with a standard text editor, a code editor like XAMLPad, or a graphical editor like Vector Architect. Anything that is created or implemented in XAML can be expressed using a more traditional .NET language, such as C# or Visual Basic .NET. However, a key aspect of the technology is the reduced complexity needed for tools to process XAML, because it is based on XML. Consequently, a variety of products are emerging, particularly in the WPF space, which create XAML-based applications. As XAML is simply based on XML, developers and designers are able to share and edit content freely amongst themselves without requiring compilation. XAML also benefits from being a declarative definition of the UI rather than procedural code to generate it.
xBase (pl, appeared 1986)
Country: United States


xBase is the generic term for all programming languages that derive from the original dBASE (Ashton-Tate) programming language and database formats. These are sometimes informally known as dBASE "clones". While there was a non-commercial predecessor to the Ashton-Tate product (Vulcan written by Wayne Ratliff), most clones are based on Ashton-Tate's 1986 dBASE III+ release — scripts written in the dBASE III+ dialect are most likely to run on all the clones.
XBase++ (pl, appeared 1997)


Xbase++ is an object oriented programming language which has multiple inheritance and polymorphism. It is based on the XBase language dialect and conventions. It is 100% Clipper compatible language supporting multiple inheritance, polymorphism, object oriented programming. It supports the xBase data types, including Codeblocks. With Xbase++ it is possible to generate applications for Windows NT, 95, 98, Me, 2000, XP, VISTA and Windows 7.
Xbasic (pl, appeared 1988)
Creators: Max Reason


XBasic is a variant of the BASIC programming language that was developed in the late 1980s for the Motorola 88000 CPU and Unix by Max Reason. In the early 1990s it was ported to Windows and Linux, and since 1999 it has been available as open source software with its runtime library under the LGPL license. It should not be confused with TI Extended BASIC, which is sometimes called XBasic or X Basic. Xbasic should also not be confused with the Xbasic language used in Alpha Software's Alpha Anywhere and Alpha Five products. Alpha Software has developed Xbasic as a proprietary language for its products. Alpha Software's Xbasic is not connected in any way at all to the version of Xbasic described in this article. Max Reason discontinued his support, and development since has been overseen by Eddie Penninkhof. Version 6.2.3 was the last official release, released on 27 October 2002.
XBEL (pl, appeared 2006)


The XML Bookmark Exchange Language (XBEL), is an open XML standard for sharing Internet URIs, also known as bookmarks (or favorites in Internet Explorer). An example of XBEL use is the XBELicious application, which stores Del.icio.us bookmarks in XBEL format. The Galeon, Konqueror, Arora and Midori web browsers use XBEL as the format for storing user bookmarks. The SiteBar bookmark server can import and export bookmarks in XBEL format. XBEL was created by the Python XML Special Interest Group "to create an interesting, fun project which was both useful and would demonstrate the Python XML processing software which was being developed at the time".It is also used by Nautilus and gedit of the GNOME desktop environment.
XML Binding Language (xmlFormat, appeared 2000)
Stands for: XML Binding Language


XBL (XML Binding Language) is an XML-based markup language used to declare the behavior and look of XUL-widgets and XML elements. Development of the XBL specification was abandoned by the W3C in 2012. XBL was developed by the Mozilla project for use in the Mozilla Application Suite; the language is not currently described by any formal standard and is thus proprietary to Mozilla, with the only implementation being the Gecko layout engine. XBL 2.0 is the latest version of XBL. XBL 1.0 was first developed at Netscape in 2000 and announced in 2001. In August 2015, Mozilla announced that the use of XBL for creating Firefox add-ons would be deprecated in the future in favour of WebExtensions. Pale Moon, a fork of Firefox, will continue to support XBL indefinitely.
XBLite (pl, appeared 2001)
Creators: David Szafranski


XBLite is a free Open Source BASIC programming language compiler and development system. It was started in 2001 by David Szafranski in order to provide a Windows exclusive version of the XBasic dialect. XBLite is released under the GNU GPL licensing scheme, Standard libraries are released under the GNU LGPL licensing scheme. The XBLite syntax is very similar to that of XBasic and somewhat similar to Microsoft's QuickBASIC in that it is a procedural language capable of subs and functions.  XBLite also has 64 bit integer data type, User Defined Types and the ability to have multiple modules in order to create GUI applications or games.
XBRL (xmlFormat, appeared 2003)


XBRL (eXtensible Business Reporting Language) is a freely available and global framework for exchanging business information.  XBRL allows the expression of semantic meaning commonly required in business reporting. The language is XML-based and uses the XML syntax and related XML technologies such as XML Schema, XLink, XPath, and Namespaces. One use of XBRL is to define and exchange financial information, such as a financial statement. The XBRL Specification is developed and published by XBRL International, Inc. (XII). XBRL is a standards-based way to communicate and exchange business information between business systems. These communications are defined by metadata set out in taxonomies, which capture the definition of individual reporting concepts as well as the relationships between concepts and other semantic meaning.  Information being communicated or exchanged is provided within an XBRL instance. Early users of XBRL included regulators such as the U.S. Federal Deposit Insurance Corporation and the Committee of European Banking Supervisors (CEBS).   Common functions in many countries that make use of XBRL include regulators of stock exchanges and securities, banking regulators, business registrars, revenue reporting and tax-filing agencies, and national statistical agencies. A wiki repository of XBRL projects is available to be freely explored and updated. Within the last ten years, the Securities and Exchange Commission (SEC), the United Kingdom's HM Revenue and Customs (HMRC), and Singapore's Accounting and Corporate Regulatory Authority (ACRA), had begun to require companies to use it, and other regulators were following suit. Development of the SEC's initial US GAAP Taxonomy was led by XBRL US and was accepted and deployed for use by public companies in 2008 in phases, with the largest filers going first: foreign companies which use International Financial Reporting Standards (IFRS) are expected to submit their financial returns to the SEC using XBRL once the IFRS taxonomy has been accepted by the SEC. In the UK in 2011, both HMRC and Companies House accepted XBRL in the iXBRL format. XBRL was adopted by the Ministry of Corporate Affairs (MCA) of India for filing financial and costing information with the Central Government.
XC (pl, appeared 2005)
Stands for: XMOS community


In computers, XC is a programming language for real-time embedded parallel processors, targeted at the XMOS XCore processor architecture.XC is an imperative language, based on the features for parallelism and communication in occam, and the syntax and sequential features of C. It provides primitive features that correspond to the various architectural resources provided, namely: channel ends, locks, ports and timers. In combination with XCore processors, XC is used to build embedded systems with levels of I/O, real-time performance and computational ability usually attributed to field-programmable gate arrays (FPGAs) or application-specific integrated circuit (ASIC) devices.
xCard (xmlFormat, appeared 2011)




<?xml version="1.0" encoding="UTF-8"?>
<vcards xmlns="urn:ietf:params:xml:ns:vcard-4.0">
  <vcard>
    <n>
      <surname>Gump</surname>
      <given>Forrest</given>
      <additional/>
      <prefix>Mr.</prefix>
      <suffix/>
    </n>
    <fn>
      <text>Forrest Gump</text>
    </fn>
    <org>
      <text>Bubba Gump Shrimp Co.</text>
    </org>
    <title>
      <text>Shrimp Man</text>
    </title>
    <photo>
      <parameters>
        <mediatype>
          <text>image/gif</text>
        </mediatype>
      </parameters>
      <uri>http://www.example.com/dir_photos/my_photo.gif</uri>
    </photo>
    <tel>
      <parameters>
        <type>
          <text>work</text>
          <text>voice</text>
        </type>
      </parameters>
      <uri>tel:+1-111-555-1212</uri>
    </tel>
    <tel>
      <parameters>
        <type>
          <text>home</text>
          <text>voice</text>
        </type>
      </parameters>
      <uri>tel:+1-404-555-1212</uri>
    </tel>
    <adr>
      <parameters>
        <label>
          <text>100 Waters Edge
Baytown, LA 30314
United States of America</text>
        </label>
        <type>
          <text>work</text>
        </type>
        <pref>
          <integer>1</integer>
        </pref>
      </parameters>
      <pobox/>
      <ext/>
      <street>100 Waters Edge</street>
      <locality>Baytown</locality>
      <region>LA</region>
      <code>30314</code>
      <country>United States of America</country>
    </adr>
    <adr>
      <parameters>
        <label>
          <text>42 Plantation St.
Baytown, LA 30314
United States of America</text>
        </label>
        <type>
          <text>home</text>
        </type>
      </parameters>
      <pobox/>
      <ext/>
      <street>42 Plantation St.</street>
      <locality>Baytown</locality>
      <region>LA</region>
      <code>30314</code>
      <country>United States of America</country>
    </adr>
    <email>
      <text>forrestgump@example.com</text>
    </email>
    <rev>
      <timestamp>20080424T195243Z</timestamp>
    </rev>
  </vcard>
</vcards>
XCAS (pl, appeared 2001)


Xcas is a user interface to Giac, a free, basic Computer Algebra System (CAS) for Microsoft Windows, Apple macOS and Linux/Unix. Giac can be used directly inside software written in C++. Giac has a compatibility mode with Maple and MuPAD and Qcas and ExpressionsinBar software and TI-89, TI-92, Voyage 200 and TI-Nspire calculators. Users can use Giac/Xcas as well as a free software compatible with Maple to develop formal algorithms or use it in other software. Among other things Xcas can solve equations and draw graphs. CmathOOoCAS, an OpenOffice.org plugin which allows formal calculation in Calc spreadsheet and Writer word processing, uses Xcas to perform calculations.
XCore Architecture (isa, appeared 2007)


The XCore Architecture is a 32-bit RISC microprocessor architecture designed by XMOS. The architecture is designed to be used in multi-core processors for embedded systems. Each XCore executes up to eight concurrent threads, each thread having its own register set, and the architecture directly supports inter-thread and inter-core communication and various forms of thread scheduling. Two versions of the XCore architecture exist: the XS1 architecture  and the XS2 architecture. Processors with the XS1 architecture include the XCore XS1-G4 and XCore XS1-L1. Processors with the XS2 architecture include xCORE-200. The architecture encodes instructions compactly, using 16 bits for frequently used instructions (with up to three operands) and 32 bits for less frequently used instructions (with up to 6 operands). Almost all instructions execute in a single cycle, and the architecture is event-driven in order to decouple the timings that a program needs to make from the execution speed of the program. A program will normally perform its computations and then wait for an event (e.g. a message, time, or external I/O event) before continuing.
XDR Schema (xmlFormat, appeared 1998)


XML-Data Reduced (XDR) was a schema language for specifying and validating XML documents. In January 1998, Microsoft, the University of Edinburgh and others submitted a proposal for an XML schema language called XML-Data to the World Wide Web Consortium. XML-Data Reduced was a subset of XML-Data, with some corrections and amendments submitted in July 1998.The XML Schema (W3C) effort in the World Wide Web Consortium (W3C) received several other proposals, and while the final result has some similarities to the XML-Data proposal, it is significantly different. XDR was implemented in SQL Server 2000 and BizTalk Server 2000. Once the XML Schema Definition was finalized in 2001, Microsoft products and tools added support for it, and XDR was gradually phased out. Microsoft XML Core Services provided XDR schema support from versions 2.0 up to - but not including - version 6.0.
xduce (pl, appeared 2003)
Creators: Haruo Hosoya
Benjamin C. Pierce

XDuce is a statically typed programming language for XML processing. Its basic data values are XML documents, and its types (so-called regular expression types) directly correspond to document schemas. XDuce also provides a flexible form of regular expression pattern matching, integrating conditional branching, tag checking, and subtree extraction, as well as dynamic typechecking. We survey the principles of XDuce’s design, develop examples illustrating its key features, describe its foundations in the theory of regular tree automata, and present a complete formal definition of its core, along with a proof of type safety.



addrbook[
 person[name["Haruo Hosoya"],
   email["hahosoya@kyoto-u"],
   email["hahosoya@upenn"]],
 person[name["Benjamin Pierce"],
   email["bcpierce@upenn"],
   tel["123-456-789"]]]
XeTeX (textMarkup, appeared 2004)
Website: http://xetex.sourceforge.net


XeTeX ( ZEE-tekh or ; see also Pronouncing and writing "TeX") is a TeX typesetting engine using Unicode and supporting modern font technologies such as OpenType, Graphite and Apple Advanced Typography (AAT). It was originally written by Jonathan Kew and is distributed under the X11 free software license. Initially developed for Mac OS X only, it is now available for all major platforms. It natively supports Unicode and the input file is assumed to be in UTF-8 encoding by default. XeTeX can use any fonts installed in the operating system without configuring TeX font metrics, and can make direct use of advanced typographic features of OpenType, AAT and Graphite technologies such as alternative glyphs and swashes, optional or historic ligatures, and variable font weights. Support for OpenType local typographic conventions (locl tag) is also present. XeTeX even allows raw OpenType feature tags to be passed to the font. Microtypography is also supported. XeTeX also supports typesetting mathematics using Unicode fonts that contain special mathematical features, such as Cambria Math or Asana Math as an alternative to the traditional mathematical typesetting based on TeX font metrics.


\documentclass[11pt]{article}
\usepackage{fontspec}
\setmainfont[Ligatures=TeX]{Linux Libertine O}
\begin{document}
\section{Unicode support}

\subsection{English}
All human beings are born free and equal in dignity and rights.
 
\subsection{Íslenska}
Hver maður er borinn frjáls og jafn öðrum að virðingu og réttindum.
Xgboost (binaryDataFormat, appeared 2014)
File extensions: model

The model and data format of XGBoost is exchangeable, which means the model trained by one language can be loaded in another. This means you can train the model using R, while running prediction using Java or C++, which are more common in production systems. You can also train the model using distributed versions, and load them in from Python to do some interactive analysis.

XGBoost is an open-source software library which provides a gradient boosting framework for C++, Java, Python,R, and Julia. It works on Linux, Windows, and macOS. From the project description, it aims to provide a "Scalable, Portable and Distributed Gradient Boosting (GBM, GBRT, GBDT) Library". Other than running on a single machine, it also supports the distributed processing frameworks Apache Hadoop, Apache Spark, and Apache Flink. It has gained much popularity and attention recently as it was the algorithm of choice for many winning teams of a number of machine learning competitions.
XHTML (dataNotation, appeared 2000)


eXtensible HyperText Markup Language (XHTML) is part of the family of XML markup languages. It mirrors or extends versions of the widely used HyperText Markup Language (HTML), the language in which Web pages are formulated. While HTML, prior to HTML5, was defined as an application of Standard Generalized Markup Language (SGML), a flexible markup language framework, XHTML is an application of XML, a more restrictive subset of SGML. XHTML documents are well-formed and may therefore be parsed using standard XML parsers, unlike HTML, which requires a lenient HTML-specific parser.XHTML 1.0 became a World Wide Web Consortium (W3C) recommendation on January 26, 2000. XHTML 1.1 became a W3C recommendation on May 31, 2001. The standard known as XHTML5 is being developed as an XML adaptation of the HTML5 specification.
Xidoc (textMarkup, appeared 2021)
Creators: Adam Blažek
Origin: Adam Blažek
Country: Czech Republic
Website: https://xidoc.nim.town/

A consistent markup language


GitHub description: A consistent markup language

[section HTML;
  [p
    HTML is such an [it ugly] language!
    Each [code html; <tag>] has to be repeated twice.
  ]
]
[section [LaTeX];
  [p
    [LaTeX] is great for writing math formulas like [$ e^{\tau i} = 1],
    but it's painful to write with all those [code latex; \begin], [code latex; \end]
    and different syntaxes for different things.
  ]
]