!!!XML [DTD][XQuery] {{amazon 4873111846}} !!XML宣言 *で終わる !!文書型宣言(document type declaration) * !公開識別子(public identifier) PUBLIC " public-identifier " " backup-system-identifier " ::例 !!宣言 !実体宣言(entity declaration) ::例 !実体参照(entity reference) ::例 My Exciting Book &chap2; & name ; !!!XML DB *DB2 XML DB (pureXML) !!!XQuery *XQuery