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主題：軟考英語精典短文每日一練(2006-07-17)</STRONG></TD></TR>
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<TD width=64>作 者</TD>
<TD width=233>syhnjs</TD>
<TD width=63>閱讀次數(shù)</TD>
<TD width=85>757</TD>
<TD width=63>回復(fù)次數(shù)</TD>
<TD width=85>8</TD></TR>
<TR align=middle bgColor=#ffffff>
<TD width=64>所屬欄目</TD>
<TD width=233>基礎(chǔ)應(yīng)用與新手入門>> IT英語</TD>
<TD width=63>發(fā)表日期</TD>
<TD width=85>2006-7-17</TD>
<TD width=63>回復(fù)日期</TD>
<TD
width=85>2006-8-16</TD></TR></TBODY></TABLE></TD></TR></TBODY></TABLE></TD></TR></TBODY></TABLE>
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<DIV align=center><IMG height=15
src="軟考英語精典短文每日一練(2006-07-17)_files/vb_bullet.gif" width=15><BR><A
class=chinablue title=給他/她留言
href="http://po.csai.cn/write_shortmess.asp?func=0&username=syhnjs"
target=_blank>syhnjs</A><BR><IMG alt=等級2
src="軟考英語精典短文每日一練(2006-07-17)_files/top-2.gif"><BR>
<DIV class=userInfoBox>積分：4267<BR>第二級</DIV>
<DIV class=userInfoBox>注冊時間<BR>2003-4-4</DIV></DIV></TD>
<TD class=bbsmain style="WORD-BREAK: break-all; WHITE-SPACE: normal"
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<DIV class=TitleInfoBox align=right>發(fā)表時間：2006-7-17 17:46:12 樓主</DIV>
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<DIV id=cont_right style="WIDTH: 495px">XML Schema<BR><BR>XML Schema is an
XML Schema Language for XML. After XML's success for B2B applications, it
quickly became apparent that XML's built-in XML Schema Language, the DTD,
did not meet the requirements of application developers. XML Schema has
thus been standardized by the W3C and extends DTD considerably, in
particular with a type system supporting type derivation, and with a
number of built-in simple types (such as integer, float, date, and time).
While XML Schema is much more powerful than DTDs, it is also much more
complex, but it is very likely that over time XML Schema will replace
DTDs.</DIV></TD></TR>
<TR bgColor=#ffffff>
<TD class=hai vAlign=top align=middle width=83 height=70>
<DIV align=center><A class=chinablue title=給他/她留言
href="http://po.csai.cn/write_shortmess.asp?func=0&username=syhnjs"
target=_blank>syhnjs</A><BR><IMG alt=等級2
src="軟考英語精典短文每日一練(2006-07-17)_files/top-2.gif"><BR>
<DIV class=userInfoBox>積分：4267<BR>第二級</DIV>
<DIV class=userInfoBox>注冊時間<BR>2003-4-4</DIV></DIV></TD>
<TD class=bbsmain style="WORD-BREAK: break-all; WHITE-SPACE: normal"
vAlign=top align=left height=70>
<DIV class=TitleInfoBox align=right>發(fā)表時間：2006-7-18 15:16:44 第1樓</DIV>
<HR style="MARGIN-TOP: -5px; COLOR: #cccccc" align=center width="100%"
noShade SIZE=1>
<DIV id=cont_right style="WIDTH: 495px">XML Schema是一種針對XML而開發(fā)的XML
Schema語言。當(dāng)XML在B2B中獲得成功的應(yīng)用后，由于DTD不能滿足應(yīng)用程序開發(fā)者的需要，很快的在XML中內(nèi)嵌入XML
Schema語言是顯而易見的了。XML Schema的規(guī)范有W3C指定，在相當(dāng)?shù)某潭壬贤卣沽薉TD，特別是使用一個類型系統(tǒng)支持類型起源，同時XML
Schema內(nèi)嵌了一系列的簡單類型（例如整型、浮點(diǎn)型、日期型、時間型）。顯而易見隨著時間的推移，當(dāng)XML
Schema比DTD更加強(qiáng)大時，它會變得更加負(fù)責(zé)，但是最終將替代DTD。</DIV></TD></TR>
<TR bgColor=#f5f5f5>
<TD class=hai vAlign=top align=middle width=83 height=70>
<DIV align=center><A class=chinablue title=給他/她留言
href="http://po.csai.cn/write_shortmess.asp?func=0&username=syhnjs"
target=_blank>syhnjs</A><BR><IMG alt=等級2
src="軟考英語精典短文每日一練(2006-07-17)_files/top-2.gif"><BR>
<DIV class=userInfoBox>積分：4267<BR>第二級</DIV>
<DIV class=userInfoBox>注冊時間<BR>2003-4-4</DIV></DIV></TD>
<TD class=bbsmain style="WORD-BREAK: break-all; WHITE-SPACE: normal"
vAlign=top align=left height=70>
<DIV class=TitleInfoBox align=right>發(fā)表時間：2006-7-18 15:18:23 第2樓</DIV>
<HR style="MARGIN-TOP: -5px; COLOR: #cccccc" align=center width="100%"
noShade SIZE=1>
<DIV id=cont_right style="WIDTH: 495px">相關(guān)知識:<BR><BR>XML Schema
包含PSVI<BR><BR>XML Schema 是基于XML XML Infoset XML Namespaces
XPath的<BR><BR>XML Schema 是<BR><BR>CRVX DFDL DFXP EML JAXB MADS METS MIX
MODS MSL WS-CDL WSDL xAL XER XJ xNAL xNL XSCS XSOM的基礎(chǔ)<BR><BR>XML Schema
可用MSXML Xerces XML Spy這些工具實(shí)現(xiàn)<BR><BR>XML Schema
權(quán)威定義詳見http://www.w3.org/XML/Schema<BR><BR>XML Schema
的拓展說明見<BR><BR>http://nwalsh.com/xml2001/schematownhall/<BR><BR>http://www.techquila.com/topicmaps/xmlschema/</DIV></TD></TR>
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