Initial data commit

Task/XML-XPath/F-Sharp/xml-xpath.fs

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+open System.IO
+open System.Xml.XPath
+
+let xml = new StringReader("""
+<inventory title="OmniCorp Store #45x10^3">
+  <section name="health">
+    <item upc="123456789" stock="12">
+      <name>Invisibility Cream</name>
+      <price>14.50</price>
+      <description>Makes you invisible</description>
+    </item>
+    <item upc="445322344" stock="18">
+      <name>Levitation Salve</name>
+      <price>23.99</price>
+      <description>Levitate yourself for up to 3 hours per application</description>
+    </item>
+  </section>
+  <section name="food">
+    <item upc="485672034" stock="653">
+      <name>Blork and Freen Instameal</name>
+      <price>4.95</price>
+      <description>A tasty meal in a tablet; just add water</description>
+    </item>
+    <item upc="132957764" stock="44">
+      <name>Grob winglets</name>
+      <price>3.56</price>
+      <description>Tender winglets of Grob. Just add water</description>
+    </item>
+  </section>
+</inventory>
+""")
+
+let nav = XPathDocument(xml).CreateNavigator()
+
+// first "item"; throws if none exists
+let item = nav.SelectSingleNode(@"//item[1]")
+
+// apply a operation (print text value) to all price elements
+for price in nav.Select(@"//price") do
+    printfn "%s" (price.ToString())
+
+// array of all name elements
+let names = seq { for name in nav.Select(@"//name") do yield name } |> Seq.toArray