計算機經典英語短文閱讀
計算機是一個在現在社會是哪個隨處可見的東西了，小編今天就給大家整理了有關於計算機的英語，大家快點行動起來學習一下吧
CMS is used to digitally sign or encrypt arbitrary messages. CMS describes an encapsulation syntax for data protection. It supports digital signatures and Encryption. The syntax allows multiple encapsulation, so one encapsulation envelope can be nested inside another. Likewise, one party can digitally sign some previously encapsulated data. It also allows arbitrary attributes, such as signing time, to be authenticated along with the message content, and provides for other attributes such as counter-signatures to be associated with a signature.
CMS被用於數據簽名或者任意消息加密中。CMS提供了一套用於數據保護的數據封裝語法。該語法支持數據簽名和數據加密。該語法允許多重封裝，所以一封數據信封能被另外一封數據信封所封裝。同樣的，該語法封裝數據的部分數據位可以用來表示被封裝數據。也允附加一些屬性如簽名時間，它和內容信息一起用於鑑別信息;計數器屬性，它爲其它屬性提供計數信息。
計算機英語二
XDM is the foundation of XPath 2.0 and defines the Data Model for XPath 2.0 (and consequently XQuery 1.0 and XSLT 2.0, which are both based on XPath 2.0). XDM is built on top of the XML Info set (the abstraction of an XML document), PSVI (type annotations in the XML Info set as the result of XML Schema validation), the simple data types of XML Schema, and additional concepts. The most important additional concept is that of a "sequence", which embraces both simple data types and the XML-derived nodes.
XDM是XPath2.0的基礎，它定義了XPath2.0的數據模型(因此XQuery 1.0 、XSLT 2.0也就基於XPath 2.0)。XDM 建立在XML信息集(從XML文檔中抽取)和PSVI(作爲確認XML Schema結果的XML信息集合的註釋類型)的頂端、屬於簡單的XML Schema的數據類型、是一個附加的概念。其中，它最重要的附加概念就是“順序”，即包括簡單數據類型和XML的源節點。
計算機英語三
Internet technical specifications often need to define a format syntax and are free to employ whatever notation their authors deem useful. Over the years, a modified version of BNF, called ABNF, has been popular among many Internet specifications. It balances compactness and simplicity with reasonable representational power.
互聯網技術規範經常需要定義一種格式化語法並能自由地使用作者認爲是有用的任何符號。多年來，巴克斯範式(BNF)的一個修訂版，即擴展巴克斯範式(ABNF)，已經在許多互聯網規範中流行。該版本平衡了壓縮性和簡單性，具有合理的表達能力。
