libmpdserver

 1name: count
 2argv:
 3  - type: expr
 4    value:
 5      name: AND
 6      operation:
 7      argument:
 8        name: NOT
 9        operation:
10        argument:
11          name: AND
12          operation:
13          argument:
14            name: base
15            operation:
16            argument: foo bar baz
17          next:
18            name: artist
19            operation: !=
20            argument: foobar
21      next:
22        name: modified-since
23        operation:
24        argument: 1337