The Portable Document Format (PDF) is a file format used to present documents in a manner independent of application software, hardware, and operating systems. Each PDF file encapsulates a complete description of a fixed-layout flat document, including the text, fonts, graphics, and other information needed to display it. In 1991, Adobe Systems' co-founder John Warnock outlined a system called "Camelot" that developed into PDF.
Adobe Systems made the PDF specification available free of charge in 1993. PDF was a proprietary format controlled by Adobe, until it was officially released as an open standard on July 1, 2008, and published by the International Organization for Standardization as ISO 32000-1:2008, at which time control of the specification passed to an ISO Committee of volunteer industry experts. In 2008, Adobe published a Public Patent License to ISO 32000-1 granting royalty-free rights for all patents owned by Adobe that are necessary to make, use, sell, and distribute PDF compliant implementations. However, there are still some proprietary technologies defined only by Adobe, such as Adobe XML Forms Architecture and JavaScript for Acrobat, which are referenced by ISO 32000-1 as normative and indispensable for the application of the ISO 32000-1 specification. These proprietary technologies are not standardized and their specification is published only on Adobe’s website. The ISO committee is actively standardizing many of these as part of ISO 32000-2.
Palladium(II,IV) fluoride, also known as palladium trifluoride, is a chemical compound of palladium and fluorine. It has the empirical formula PdF3, but is better described as the mixed-valence compound palladium(II) hexafluoropalladate(IV), PdII[PdIVF6] and is often written as Pd[PdF6] or Pd2F6.
Pd[PdF6] is the most stable product of the reaction of fluorine and metallic palladium.
Pd[PdF6] is paramagnetic and both Pd(II) and Pd(IV) occupy octahedral sites in the crystal structure. The PdII-F distance is 2.17 Å, whereas the PdIV-F distance is 1.90 Å.
Palladium(II) fluoride, also known as palladium difluoride, is the chemical compound of palladium and fluorine with the formula PdF2.
PdF2 is prepared by refluxing palladium(II,IV) fluoride, PdII[PdIVF6], with selenium tetrafluoride, SeF4.
Like its lighter congener nickel(II) fluoride, PdF2 adopts a rutile-type crystal structure, containing octahedrally coordinated palladium, which has the electronic configuration t6
2g e2
g. This configuration causes PdF2 to be paramagnetic due to two unpaired electrons, one in each eg-symmetry orbital of palladium.
A document is a written, drawn, presented or recorded representation of thoughts. Originating from the Latin Documentum meaning lesson - the verb doceō means to teach, and is pronounced similarly, in the past it was usually used as a term for a written proof used as evidence. In the computer age, a document is usually used to describe a primarily textual file, along with its structure and design, such as fonts, colors and additional images.
The modern term 'document' can no longer be defined by its transmission medium (such as paper), following the existence of electronic documents. 'Documentation' has more meanings than a written or drawn presentation of thoughts.
The formal term 'document' is defined in Library and information science and in documentation science, as a basic theoretical construct. It is everything which may be preserved or represented in order to serve as evidence for some purpose. The classical example provided by Suzanne Briet is an antelope: "An antelope running wild on the plains of Africa should not be considered a document, she rules. But if it were to be captured, taken to a zoo and made an object of study, it has been made into a document. It has become physical evidence being used by those who study it. Indeed, scholarly articles written about the antelope are secondary documents, since the antelope itself is the primary document." (Quoted from Buckland, 1998 ). (This view has been seen as an early expression of what now is known as actor–network theory).
Document is a basic theoretical construct that refers to everything that may be preserved or represented in order to serve as evidence for some purpose.
Document or documents may also refer to:
Document is the fifth studio album by the American alternative rock band R.E.M. It was released in 1987 a few months after their rarities collection Dead Letter Office appeared and is the last album of new material by the band released on the I.R.S. Records label. It is the first album on which the band worked with producer Scott Litt.
Document was R.E.M.'s first album co-produced by Scott Litt and the band, a collaboration that continued through Green, Out of Time, Automatic for the People, Monster, and New Adventures in Hi-Fi. The album's clear production and muscular rock riffs helped to move the band towards mainstream success and built on the work done by Don Gehman, who had produced their previous album Lifes Rich Pageant. This release not only launched "The One I Love," R.E.M.'s first Top 10 hit on the Billboard Hot 100 (it reached number nine), but also gave them their first platinum album.
"Exhuming McCarthy" makes an explicit parallel between the red-baiting of Joe McCarthy's time and the strengthening of the sense of American exceptionalism during the Reagan era, especially the Iran-Contra affair. Starting with the click-clack of a typewriter, it also includes a sound clip of Joseph Welch's rebuke of McCarthy from the Army-McCarthy Hearings: "Let us not assassinate this lad further, Senator.... You've done enough. Have you no sense of decency, sir, at long last? Have you left no sense of decency?"