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1. DTD
a. ×îÔçµÄXML Contraint
b. ÓÉW3C¶¨Òå
C. ·Ç³£¼òµ¥
2. XML Schema
a. ĿǰӦÓÃ×î¹ãµÄXML Contraint
b. ÓÉW3C¶¨Òå
c. ºÜÁé»î£¬µ«·Ç³£¸´ÔÓ
3. Relax NG
a. ÊǸöÒ°º¢×Ó£¬²»ÊÇÓÉW3C¶¨Òå
b. ·Ç³£·Ç³£¼òµ¥Ö±¹Û
c. ¶ÔÓÚÐèҪƵ·±¶¨ÒåContraintµÄEngineer·Ç³£ºÏÊÊ
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1. XML Document -> DTD/XML Schema/Relax NG
    Relaxer
2. DTD -> XML Schema
    DTD2XD
3. DTD -> Relax NG
    Relax Converter
4. XML Schema -> Relax NG
    Relax Converter


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//µÃµ½Óû§ÒªÉÏ´«µÄÎļþÃû
string strFilePathName = loFile.PostedFile.FileName;
string strFileName = Path.GetFileName(strFilePathName);
int FileLength = loFile.PostedFile.ContentLength;
if(FileLength<=0)
return; ......

XML XQuery

--XQuery »ùÓÚÏÖÓÐµÄ XPath ²éѯÓïÑÔ£¬²¢Ö§³Ö¸üºÃµÄµü´ú¡¢¸üºÃµÄÅÅÐò½á¹ûÒÔ¼°¹¹Ôì±ØÐèµÄ XML µÄ¹¦ÄÜ¡£
--1.ÉùÃ÷Ò»¸ö xml ÀàÐ͵ıäÁ¿£¬È»ºóʹÓà xml Êý¾ÝÀàÐ굀 query() ·½·¨À´²éѯ´Ë±äÁ¿
DECLARE @x xml
SET @x = '<ROOT><a>111</a></ROOT>'
SELECT @x.query('/ROOT/a')
--²éÕÒÊôÐÔaid=20µÄa½ ......

DataTabת»»XML XMLת»»DataTable µÄÀà

public string ConvertDataTableToXML(DataTable xmlDS)
{
MemoryStream stream = null;
XmlTextWriter writer = null;
try
{
stream = new MemoryStream();
writer = new XmlTextWriter(stream, Encoding.Default);
......
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