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employeenumber<=1100008

I've been reviewing the BLITS 2.3 and a question regarding the
Less-Than-Or-Equal-To (3.3.2.1.4) test.
  http://www.opengroup.org/directory/dc5/blits0/blits23.htm#3.3.2.1

The test uses the filter (employeenumber<=1100008) expecting a
subset of the entries in the DIT to be returned.  However,
employeenumber is defined in RFC 2798, 2.4 as:
   ( 2.16.840.1.113730.3.1.3
      NAME 'employeeNumber'
      DESC 'numerically identifies an employee within an organization'
      EQUALITY caseIgnoreMatch
      SUBSTR caseIgnoreSubstringsMatch
      SYNTAX 1.3.6.1.4.1.1466.115.121.1.15                      
      SINGLE-VALUE )

Note the lack of an ORDERING matching rule.  Per X.501, 12.4.5:
  If no ordering matching rule is indicated the Directory shall treat
  any assertion of an ordering match using the syntax provided by the
  Directory Abstract Service as undefined.

That is, the filter should evaluate to undefined and per three
value logic, no entries should be returned.  Is this correct?

If not correct, how does the server determine a suitable
matching rule to use?

	Kurt