Asserts that the number of messages recived by the node specified by the
 first parameter (by name) equals the number specifed in the second parameter

Suspend execution until the time specifed by the first parameter (on the
 format yyyy-MM-dd'T'HH:mm:ss.SSSZ, i.e: 2008-07-04T12:08:56.235+0100)

Delay execution the number of seconds specifed by the first parameter

Asserts that the single parameter is null

Asserts that the single parameter is not null

Asserts that the two provider parameters are equal

Asserts that the two provider parameters are equal

Validates that a selected field from the last received message matches a
 specifed value.  The field to select and the value it must be equal to
 is specified as a single parameter on the form: [XPath expression that
 selects the single attribute or element ]==[value that the selected field
 must be equal to] 
 Namespace information in the evaluated messages is ignored, so the XPath
 expressions must not include namespace prefixes

Validates that a selected field from the last received message matches a
 specifed value.  The field to select and the value it must be equal to
 is specified as a single parameter on the form: [XPath expression that
 selects the single attribute or element ]==[a regular expression that the
 field must match] 
 Namespace information in the evaluated messages is ignored, so the XPath
 expressions must not include namespace prefixes