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The fourth node of mydvd7.xml is where the data tree hangs. The name of the top-level child is sales (xmlDoc.childNodes[3].nodeName), from the sales tag:
<sales> . . . </sales>
The sales node has two child nodes:
summary (xmlDoc.childNodes[3].childNodes[0].nodeName)data (xmlDoc.childNodes[3].childNodes[1].nodeName)The summary node has five child nodes:
heading (xmlDoc.childNodes[3].childNodes[0].childNodes[0].nodeName)subhead (xmlDoc.childNodes[3].childNodes[0].childNodes[1].nodeName)description (xmlDoc.childNodes[3].childNodes[0].childNodes[2].nodeName)author (xmlDoc.childNodes[3].childNodes[0].childNodes[3].nodeName)date (xmlDoc.childNodes[3].childNodes[0].childNodes[4].nodeName)The summary's child nodes do not have any lower-level child nodes. The data node is the root of a much deeper tree, as it holds the actual data of the dvds. The data node has three child nodes, one for every month of the report:
month (January) (xmlDoc.childNodes[3].childNodes[1].childNodes[0].nodeName)month (February) (xmlDoc.childNodes[3].childNodes[1].childNodes[1].nodeName)month (March) (xmlDoc.childNodes[3].childNodes[1].childNodes[2].nodeName)Each month has five child nodes: one for its name and four for its four week proceeds. Here are the child nodes of January:
name (xmlDoc.childNodes[3].childNodes[1].childNodes[0].childNodes[0].nodeName)week (xmlDoc.childNodes[3].childNodes[1].childNodes[0].childNodes[1].nodeName)week (xmlDoc.childNodes[3].childNodes[1].childNodes[0].childNodes[2].nodeName)week (xmlDoc.childNodes[3].childNodes[1].childNodes[0].childNodes[3].nodeName)week (xmlDoc.childNodes[3].childNodes[1].childNodes[0].childNodes[4].nodeName)Similarly, here are the child nodes of February:
name (xmlDoc.childNodes[3].childNodes[1].childNodes[1].childNodes[0].nodeName)week (xmlDoc.childNodes[3].childNodes[1].childNodes[1].childNodes[1].nodeName)week (xmlDoc.childNodes[3].childNodes[1].childNodes[1].childNodes[2].nodeName)week (xmlDoc.childNodes[3].childNodes[1].childNodes[1].childNodes[3].nodeName)week (xmlDoc.childNodes[3].childNodes[1].childNodes[1].childNodes[4].nodeName)March's three child nodes are:
name (xmlDoc.childNodes[3].childNodes[1].childNodes[2].childNodes[0].nodeName)week (xmlDoc.childNodes[3].childNodes[1].childNodes[2].childNodes[1].nodeName)week (xmlDoc.childNodes[3].childNodes[1].childNodes[2].childNodes[2].nodeName)week (xmlDoc.childNodes[3].childNodes[1].childNodes[2].childNodes[3].nodeName)week (xmlDoc.childNodes[3].childNodes[1].childNodes[2].childNodes[4].nodeName)The name nodes have child nodes of their own, one per node. They hold the name's text property:
January (xmlDoc.childNodes[3].childNodes[1].childNodes[0].childNodes[0].childNodes[0].text)February (xmlDoc.childNodes[3].childNodes[1].childNodes[0].childNodes[1].childNodes[0].text)March (xmlDoc.childNodes[3].childNodes[1].childNodes[0].childNodes[2].childNodes[0].text)
Next: How to select nodes
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