Page Comparison

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1. an explicit single value
   for example,  "os_info.platform": "x86_64" would match if the node's OS platform value is exactly equal to "x86_64".
2. a list of alternative values
   for example "name": [ "nodeA", "nodeB"] would match either of the two nodes named nodeA or nodeB. The comparison is again strict equality.
   The filter clause is considered a match if one or more choices amongst the list of alternatives do match.
   1. If you are using the GUI, just introduce a list of node names separated by commas. 
3. a regular expression
   for example "os_info.os":  "/IOS/i" would select nodes whose OS contains the string "IOS" (or "ios", "IoS" etc.) anywhere.
   Note that the regular expression must be given as a string, starting and ending with a "/" and optionally including the "i" modifier for case-insensitive matching.

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