Select combinate ricavate da file xml

[angelo85ct]

Select combinate ricavate da file xml

Salve ragazzi ho il seguente problema:
ho un file xml fatto cosi:

<node id="acmccs98" label="ACMCCS98">
	<isComposedBy>
		<node id="A." label="General Literature">
			<isComposedBy>
				<node id="A.0" label="GENERAL">
					<isComposedBy>
						<node label="Biographies/autobiographies"/>
						<node label="Conference proceedings"/>
						<node label="General literary works (e.g., fiction, plays)"/>
					</isComposedBy>
				</node>
				<node id="A.1" label="INTRODUCTORY AND SURVEY"/>
				<node id="A.2" label="REFERENCE (e.g., dictionaries, encyclopedias, glossaries)"/>
				<node id="A.m" label="MISCELLANEOUS"/>
			</isComposedBy>
		</node>
		<node id="B." label="Hardware">
			<isComposedBy>
				<node id="B.0" label="GENERAL"/>
				<node id="B.1" label="CONTROL STRUCTURES AND MICROPROGRAMMING">
					<isRelatedTo>
						<node id="D.3.2"/>
					</isRelatedTo>
					<isComposedBy>
						<node id="B.1.0" label="General"/>
						<node id="B.1.1" label="Control Design Styles">
							<isComposedBy>
								<node label="Hardwired control">
									<hasNote type="2">The classification is no longer used as of January 1998, but the item is still searchable for previously classified documents.</hasNote>
								</node>
								<node label="Microprogrammed logic arrays">
									<hasNote type="2">The classification is no longer used as of January 1998, but the item is still searchable for previously classified documents.</hasNote>
								</node>
								<node label="Writable control store">
									<hasNote type="2">The classification is no longer used as of January 1998, but the item is still searchable for previously classified documents.</hasNote>
								</node>
							</isComposedBy>
						</node>
						<node id="B.1.2" label="Control Structure Performance Analysis and Design Aids">
							<isComposedBy>
								<node label="Automatic synthesis">
									<hasNote type="2">The classification is no longer used as of January 1998, but the item is still searchable for previously classified documents.</hasNote>
								</node>
								<node label="Formal models">
									<hasNote type="2">The classification is no longer used as of January 1998, but the item is still searchable for previously classified documents.</hasNote>
								</node>
								<node label="Simulation">
									<hasNote type="2">The classification is no longer used as of January 1998, but the item is still searchable for previously classified documents.</hasNote>
								</node>
							</isComposedBy>
						</node>
						<node id="B.1.3" label="Control Structure Reliability, Testing, and Fault-Tolerance">
							<isRelatedTo>
								<node id="B.8"/>
							</isRelatedTo>
							<hasNote type="2">The classification is no longer used as of January 1998, but the item is still searchable for previously classified documents.</hasNote>
							<isComposedBy>
								<node label="Diagnostics">
									<hasNote type="2">The classification is no longer used as of January 1998, but the item is still searchable for previously classified documents.</hasNote>
								</node>
								<node label="Error-checking">
									<hasNote type="2">The classification is no longer used as of January 1998, but the item is still searchable for previously classified documents.</hasNote>
								</node>
								<node label="Redundant design">
									<hasNote type="2">The classification is no longer used as of January 1998, but the item is still searchable for previously classified documents.</hasNote>
								</node>
								<node label="Test generation">
									<hasNote type="2">The classification is no longer used as of January 1998, but the item is still searchable for previously classified documents.</hasNote>
								</node>
							</isComposedBy>
						</node>
						
			</isComposedBy>
		</node>
	</isComposedBy>
</node>

come faccio da questo file ad estrapolare delle select?
dovrei avere una selec principale che mi scelga tra:
General Literature
o
Hardware

poi in base a quale scelgo mi sevirebbe una selcet che secliesse il sotto nodo ed un'altra select, nel caso in cui il sotto nodo ha altri sotto nodi per sempio in questo caso:

		<node id="A." label="General Literature">
			<isComposedBy>
				<node id="A.0" label="GENERAL">
					<isComposedBy>
						<node label="Biographies/autobiographies"/>
						<node label="Conference proceedings"/>
						<node label="General literary works (e.g., fiction, plays)"/>
					</isComposedBy>
				</node>
				<node id="A.1" label="INTRODUCTORY AND SURVEY"/>
				<node id="A.2" label="REFERENCE (e.g., dictionaries, encyclopedias, glossaries)"/>
				<node id="A.m" label="MISCELLANEOUS"/>
			</isComposedBy>
		</node>
//se volessi scegliere: Conference proceedings questo mi dovrebbe apparire nella terza select. Avete consigli su come fare? grazie