text: _________________________________________________________________________________FM 2-22.3
  collection requirements. These operations must be coordinated with US
  units. (See Chapter 6.)
  LIAISON OPERATIONS
  1-22. Liaison operations are programs to coordinate activities and exchange
  information with host country and allied military and civilian agencies and
  NGOs.
  HUMAN SOURCE CONTACT OPERATIONS
  1-23. Human SCO are operations directed toward the establishment of
  human sources who have agreed to meet and cooperate with HUMINT
  collectors for the purpose of providing information. Within the Army, SCO
  are conducted by trained personnel under the direction of military
  commanders. The entire range of HUMINT collection operations can be
  employed. SCO sources include one-time contacts, continuous contacts, and
  formal contacts from debriefings, liaison, and contact operations. SCO
  consist of collection activities that utilize human sources to identify attitude,
  intentions, composition, strength, dispositions, tactics, equipment, target
  development, personnel, and capabilities of those elements that pose a
  potential or actual threat to US and coalition forces. SCO are also employed
  to develop local source or informant networks that provide early warning of
  imminent danger to US and coalition forces and contribute to the Military
  Decision-Making Process (MDMP). See Chapter 5 for discussion of approval,
  coordination, and review for each type of activity.
  DOCEX OPERATIONS
  1-24. DOCEX operations are the systematic extraction of information from
  open, closed, published, and electronic source documents. These documents
  may include documents or data inside electronic communications equipment,
  including computers, telephones, Personal Digital Assistants (PDAs), and
  Global Positioning System (GPS) terminals. This operation is not solely a
  HUMINT function, but may be conducted by any intelligence personnel with
  appropriate language support.
  1-25. Many CEDs are associated with EPWs and other human sources.
  Consequently, a HUMINT collector is often the first person to screen them.
  HUMINT collectors will screen the documents associated with human
  sources and will extract information of use to them in their immediate
  collection operation. Any information discovered during this initial screening
  that might cross-cue another collection effort will be forwarded to the
  appropriate unit.
  1-26. A captured document is usually something that the enemy has written
  for his own use. For this reason, captured documents are usually truthful and
  accurate. There are cases in which falsified documents have been permitted
  to fall into enemy hands as a means of deception but these cases are not the
  norm. Normal policy of not relying on single-source information should help
  prevent deceptions of this type from being effective. Documents also do not
  forget or misinterpret information although it must be remembered that
  their authors may have. Usually, each document provides a portion of a