LDAP search filter (I)

• Equality
  • e.g.: (cn=Mister X) only entries with common name equals “Mister X”
• Negation operator
  • e.g. (!(cn=Mister X)) all entries but the one with cn equals “Mister X”
• Substring
  • e.g. (cn=Mister*) all entries with cn beginning with “Mister”
• Approximate
  • e.g.: (cn~=Mister) all entries with cn sounding similiar to “Mister”
• Greater than or equal to and less than or equal to
  • e.g. (sn<=Smith) all entries where sn equals “Smith” or is lexicographically above “Smith” (from sn=Adam to sn=smirnow)
  • (ageᡍ) is not possible, use (!(age<=21)) instead
• Presence
  • e.g. (telephoneNumber=*) all entries that contain a telephone number
  • e.g. (objectclass=*) all entries, since every entry contains at least one objectclass

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