Filename extension | .nzb [1] |
---|---|
Internet media type | application/x-nzb |
Developed by | NewzBin [2] |
Latest release | 1.1 November 10, 2009 |
Type of format | Usenet extender |
Extended from | XML |
Open format? | yes |
Website | NZB file specification [3] |
NZB is an XML-based file format for retrieving posts from NNTP (Usenet) servers. [4] The format was conceived by the developers of the Newzbin.com Usenet Index. [5] [6] NZB is effective when used with search-capable websites. [7] These websites create NZB files out of what is needed to be downloaded. [8] Using this concept, headers would not be downloaded hence the NZB method is quicker and more bandwidth-efficient than traditional methods. [9]
Each Usenet message has a unique identifier called the "Message-ID". [10] When a large file is posted to a Usenet newsgroup, it is usually divided into multiple messages (called segments or parts) each having its own Message-ID. [11] An NZB-capable Usenet client will read all needed Message-IDs from the NZB file, download them and decode the messages back into a binary file (usually using yEnc or Uuencode). [12]
The following is an example of an NZB 1.1 file. [13]
<?xml version="1.0" encoding="iso-8859-1" ?><!DOCTYPE nzb PUBLIC "-//newzBin//DTD NZB 1.1//EN" "http://www.newzbin.com/DTD/nzb/nzb-1.1.dtd"><nzbxmlns="http://www.newzbin.com/DTD/2003/nzb"><head><metatype="title">Your File!</meta><metatype="tag">Example</meta></head><fileposter="Joe Bloggs <bloggs@nowhere.example>;"date="1071674882"subject="Here's your file! abc-mr2a.r01 (1/2)"><groups><group>alt.binaries.newzbin</group><group>alt.binaries.mojo</group></groups><segments><segmentbytes="102394"number="1">123456789abcdef@news.newzbin.com</segment><segmentbytes="4501"number="2">987654321fedbca@news.newzbin.com</segment></segments></file></nzb>
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A newsreader is an application program that reads articles on Usenet distributed throughout newsgroups. Newsreaders act as clients which connect to a news server, via the Network News Transfer Protocol (NNTP), to download articles and post new articles. In addition to text-based articles, Usenet is also used to distribute binary files, generally in dedicated "binaries" newsgroups.
Newzbin was a British Usenet indexing website, intended to facilitate access to content on Usenet. The site caused controversy over its stance on copyrighted material. Access to the Newzbin.com website was blocked by BT and Sky in late 2011, following legal action in the UK by Hollywood film studios.
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Usenet is a worldwide distributed discussion system available on computers. It was developed from the general-purpose Unix-to-Unix Copy (UUCP) dial-up network architecture. Tom Truscott and Jim Ellis conceived the idea in 1979, and it was established in 1980. Users read and post messages to one or more topic categories, known as newsgroups. Usenet resembles a bulletin board system (BBS) in many respects and is the precursor to the Internet forums that have become widely used. Discussions are threaded, as with web forums and BBSs, though posts are stored on the server sequentially.
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