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Pattern matching partial derivatives

• To: mathgroup at smc.vnet.net
• Subject: [mg52372] Pattern matching partial derivatives
• From: Nicolas Girard <nicolas.girard at strasbourg.fr>
• Date: Thu, 25 Nov 2004 05:49:43 -0500 (EST)
• Sender: owner-wri-mathgroup at wolfram.com

Hi all,
I can't get finding patterns that would match a simple partial derivative:

Input:
  ?f
  ?x
  D[f, x, NonConstants -> {f}] // FullForm

Output:
  Global`f
  Global`x
  D[f, x, Rule[NonConstants, List[f]]]

Input:
  MatchQ[
    D[f, x, Rule[NonConstants, List[f]]],
    D[f_, x_, Rule[NonConstants, nc_]]
  ]
Output:
  False


Am I damned ?
Many thanks in advance !
Cheers,
Nicolas