Select node by its text value in xmlstarlet
This XPath will select Value of a State based on its Key equalling state:
/FrontendStatus/State/String[Key='state']/ValueOr, in xmlstarlet:
$ xmlstarlet sel -t -m "/FrontendStatus/State/String[Key='state']" -v Value <status.xmlWill return WatchingLiveTV as requested.
I was able to find that node using the following XPath:
/FrontendStatus/State/String[Value = 'WatchingLiveTV']/ValueWhich will return:
<Value>WatchingLiveTV</Value>Note you could also use:
//String[Value = 'WatchingLiveTV']/ValueWhich is slightly smaller.
To select the Value element and parent/siblings, you could use:
//String[Value = 'WatchingLiveTV']Which returns:
<String> <Key>state</Key> <Value>WatchingLiveTV</Value></String>Edit
I just re-read your original question. You would like to select the XML based on the value of the Key node. You can do this using the above, but changing the predicate from Value to Key:
//String[Key = 'state']/Value@kjhughes has put this into the syntax format you're after.
I hope that helps.