Òî÷íî òàê, ÿê ³ â ñõåìàõ DTD, XDR-ñõåìè ìîæóòü îïèñóâàòè âêëàäåí³ åëåìåíòè. Îïèñ âêëàäåíèõ åëåìåíò³â â³äáóâàºòüñÿ çà ïðàâèëîì.
< ElementType name= ‘.’ >
Íàïðèêëàä, äëÿ XML-äîêóìåíòà example_6.xml:
Çàâòðà î 12.45 ëåêö³ÿ ç Web-äèçàéíó
,
äå åëåìåíò <note> ìຠäî÷³ðí³é åëåìåíò text, XDR-ñõåìà âèãëÿäàòèìå òàê:
1:
2:
3:name= ‘example_6’
4:xmlns= ‘urn: shemas-microsoft-com: xml – data’
5:xmlns:dt=‘urn: shemas-microsoft-com: datatypes’>
6:
7:
8:
9:
10:.
Íåîáõ³äíî çâåðíóòè óâàãó íà òå, ùî åëåìåíò text ó ñõåì³ çãàäàíèé äâ³÷³. Ïåðøèé ðàç îïèñàíèé ó ðÿäêó 7, ÿê äî÷³ðí³é åëåìåíò åëåìåíòà note, äðóãèé, – ïîâí³ñòþ âèçíà÷àºòüñÿ â ðÿäêó 9.
ßê äî÷³ðí³ åëåìåíòè äëÿ åëåìåíòà ElementType ìîæóòü áóòè òàê³ åëåìåíòè:
Element – îãîëîøóº äî÷³ðí³é åëåìåíò
Description – çàáåçïå÷óº îïèñ ElementType åëåìåíòà
Datatype – âèçíà÷ຠòèï äàíèõ ElementType åëåìåíòà
Group – âèçíà÷ຠïîðÿäîê ïðîõîäæåííÿ åëåìåíòà
Attribute Type – âèçíà÷ຠàòðèáóò
Attribute – âèçíà÷ຠâ³äîìîñò³ ïðî äî÷³ðí³é åëåìåíò Attribute Type.
Ó ðàç³ ðîçðîáëåííÿ XDR-ñõåìè äëÿ åëåìåíòà, ùî ì³ñòèòü äåê³ëüêà ïóñòèõ åëåìåíò³â, âèêîðèñòîâóþòü íàñòóïíèé ï³äõ³ä.
Ñõåìà ñêëàäåíà äëÿ ïðèêëàäó example_7.xml:
.
XDR-ñõåìà example_7.xdr äëÿ XML-ôàéëó example_7.xml.
3:name= ‘example_7’
5:xmlns:dt= ‘urn:shemas-microsoft-com: datatypes’>
10:
11:
12:
13:
14:
Âíåñåííÿ ïóñòèõ äî÷³ðí³õ åëåìåíò³â â ÿêîñò³ àòðèáóò³â åëåìåíò³â á³ëüø âèñîêîãî ð³âíÿ, ââàæàºòüñÿ ïðèêëàäîì ãàðíîãî ïðîãðàìóâàííÿ .
Òàê, ó ïîïåðåäíüîìó ïðèêëàä³ ïîðîæí³ìè åëåìåíòàìè áóëè time ³ data. Ïåðåíåñåìî ¿õ ó XML-äîêóìåíò ÿê àòðèáóòè åëåìåíòà note.
example_8.xml
3:time= ’12:54:13’
4:date= ’17-10-2009’>
5:
6:Çàâòðà î 12.45 ëåêö³ÿ ç Web-äèçàéíó
Ç ïîÿâîþ àòðèáóò³â ó åëåìåíò³ âèíèêຠíåîáõ³äí³ñòü âèêîðèñòàííÿ â XDR-ñõåì³ åëåìåíòà AttributeType.