mirror of https://gitee.com/bigwinds/arangodb
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23 lines
4.4 KiB
HTML
<html><head><title>ArangoDB Manual</title> <style media="screen" type="text/css" style="display:none">body{background-color:white;font:13px Helvetica,arial,freesans,clean,sans-serif;line-height:1.4;color:#333;}#access{font-size:16px;margin-left:12px;display:block;margin-left:10px;margin-right:10px;background-color:#F3F1EE!important;}#access a{border-right:1px solid #DBDEDF;color:#A49F96;display:block;line-height:38px;padding:0 10px;text-decoration:none;}#navigation ul{text-transform:uppercase;list-style:none;margin:0;}#navigation li{float:left;position:relative;}#container{width:920px;margin:0 auto;}a{color:#4183C4;text-decoration:none;}.contents h2{font-size:24px;border-bottom:1px solid #CCC;color:black;}.contents h1{font-size:33px;border-bottom:1px solid #CCC;color:black;}.clearfix:after{content:".";display:block;clear:both;font-size:0;height:0;visibility:hidden;}/**/ *:first-child+html .clearfix{min-height:0;}/**/ * html .clearfix{height:1%;}</style></head><body><div id="container"><img src="images/logo_arangodb.png" width="397" height="67" alt="ArangoDB"><div id="access" role="navigation"><div id="navigation"><ul id="menu-ahome" class="menu"><li><a href="Home.html">Table of contents</a></li> <li><a href="http://www.arangodb.org">ArangoDB homepage</a></li></ul></div><div class="clearfix"></div></div><div>
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<div class="textblock"><p><b>Collection</b>: A collection consists of documents. It is uniquely identified by it's collection identifier. It also has a unique name. </p>
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<p><b>Collection Identifier</b>: A collection identifier identifies a collection in a database. It is an integer and is unique within the database. </p>
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<p><b>Collection Name</b>: A collection name identifies a collection in a database. It is an string and is unique within the database. Unlike the collection identifier it is supplied by the creator of the collection. The collection name can consist of letters, digits and the characters <code>_</code> (underscore) and <code>-</code> (dash). However, the first character must be a letter. </p>
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<p><b>Document</b>: Documents in ArangoDB are JSON objects. These objects can be nested (to any depth) and may contains lists. Each document is unique identified by its document handle. </p>
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<p><b>Document Etag</b>: The document revision enclosed in double quotes. </p>
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<p><b>Document Handle</b>: A document handle uniquely identifies a document in the database. It is a string and consists of a collection identifier and a document identifier separated by <code>/</code>. </p>
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<p><b>Document Identifier</b>: A document identifier identifies a document in a given collection. It is an integer and is unique within the collection of the document. </p>
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<p><b>Document Revision</b>: As AvocaodDB supports MVCC, documents can exist in more than one revision. The document revision is the MVCC token used to identify a particular revision of a document. It is an integer and unique within the list of document revision for a single document. Earlier revision of a document have smaller numbers. In order to find a particular revision of a document, you need the document handle and the document revision. </p>
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<p><b>Edge</b>: Edges in ArangoDB are special documents. In addition to the internal attributes <code>_id</code> and <code>_rev</code>, they have two attributes <code>_form</code> and <code>_to</code>, which contain document handles namely the start-point and the end-point of the edge. </p>
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<p><b>Edge Collection</b>: Edge collections are special collection where edge documents live. Instead of using <code>db</code>, one must use <code>edges</code> to access the edge collection. </p>
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<p><b>Geo Index</b>: A geo index is used to find places on the surface of the earth fast. </p>
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<p><b>Hash Index</b>: A hash index is used to find documents based on examples. </p>
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<p><b>Index</b>: Indexes are used to allow fast access to documents. For each collection there is always the primary index which is a hash index for the document identifier. </p>
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<p><b>Index Handle</b>: An index handle uniquely identifies an index in the database. It is a string and consists of a collection identifier and a index identifier separated by <code>/</code>. </p>
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<p><b>Priority Queue</b>: A priority queue based on an attribute of the documents. </p>
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<p><b>Skiplist Index</b>: A skiplist is used to find ranges of documents. </p>
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