text: **Machine carriage controls**
  Machine carriage controls are in data that is created on z/OS. 
  
  Because machine carriage controls are binary values, if a file contains them, it must always 
  be transferred as binary. Machine carriage controls cannot be converted to ASCII. For a list of 
  machine carriage control values, see the following website: 
  
  http://ibm.co/1M2ZtSG 
  
  **AFP Structured Fields**
  AFP, which is also called Mixed Object Document Content Architecture (MODCA), is a 
  printing architecture that was designed and created by IBM. The beginning of each AFP 
  record is called the*AFP Structured Field Introducer*. The following sample shows an example 
  and description of an AFP Structured Field Introducer (which is shown in the hexadecimal): 
  
  5A 00 10 D3 A8 A8 00 00 00 
  
  (cid:2) The first byte is always x'5A'. 
  
  (cid:2) The second and third bytes are the length (maximum length of 32767). 
  
  (cid:2) The fourth byte is always x'D3'. 
  
  (cid:2) The fourth, fifth, and sixth bytes are the Structured Field Identifier, for example, x'D3A8A8' 
  or x'D3A8AF'. 
  
  (cid:2) The seventh byte is the flag byte. The last two bytes are reserved and usually zeros. 
  
  (cid:2) The information that follows the reserved bytes depends on the Structured Field. 
  
  (cid:2) The length does not include the x'5A'. 