How the AFP Reblocking Program works

To reblock AFP file data, you use the AFRREBLK command, which specifies an input data set and, optionally, an output data set. If the output data set is not specified on the AFRREBLK command, the reblocking program determines the type of AFP object that is to be reblocked, such as overlay or object container, and then creates a reblocked data set in one of these ways:

• The reblocking program uses the AFRREBLK profile to select the data set name for the AFP object type. For example, this line in the AFRREBLK profile (see Figure 47),

  Doc240 userid().afrreblk.doc240                 /* 240 pel Document Names     */

  indicates that when a document formatted for a 240 pel resolution printer is encountered, the reblocked file becomes a member of the partitioned data set userid.afrreblk.doc240, where userid is your user ID. Therefore, when AFRREBLK reblocks the input data set userid.GRTNOVEL.UPLD, it recognizes the file as a 240-pel document from fields in the AFP data and changes its name, according to the AFRREBLK profile, to userid.afrreblk.doc240(GRTNOVEL). The second qualifier of the input data set, GRTNOVEL, becomes the member name of the output data set.

  The profile can also specify a sequential data set by using only one qualifier. For example, if the profile specifies:

  Doc240 doc240                    /* 240 pel Document Names   */

  the file being reblocked is renamed userid.dsname.DOC240, where dsname is the second qualifier of the input data set. Therefore, the input data set, userid.GRTNOVEL.UPLD, is reblocked with the name userid.GRTNOVEL.DOC240.

• If no profile exists or if no data set can be determined from the profile, the reblocking program allocates a sequential output data set with a first qualifier of your user ID, the same second qualifier as the input data set, and a third qualifier determined by the AFP object type. For example:

  userid.dsname.objtype

  Table 5 shows the third qualifier values that the reblocking program associates with the default AFP object types. The list also shows the profile keywords associated with the AFP object types.

  Table 5. Data set values for default AFP object types

  AFP Object Type	Third Qualifier	Profile Keyword
  Unbounded Box Font	FONT3820	FontUB
  240 Bounded Box Font	FONT3820	Font240
  300 Bounded Box Font Name	FONT300	Font300
  Outline Font Name	FONTOLN	FontOLN
  Page Definition Name	PDEF38PP	PageDef
  Form Definition Name	FDEF38PP	FormDef
  240 pel Document Name	LIST3820	Doc240
  Resolution Independent Document	LISTAFP	DocAFP
  240 pel Overlay	OVLY38PP	Ovly240
  Resolution Independent Overlay	OVLYAFP	OvlyAFP
  IOCA Image	IOCA	IOCA
  Object Container	AFPOBJ	AFPOBJ
  Page Segment-240 pel IM1 Image	PSEG3820	Pseg240
  Page Segment-300 pel IM1 Image	PSEGAFP	PsegAFP

  Therefore, when AFRREBLK reblocks the input data set userid.OVERLAY.UPLD, it recognizes the file as a 240-pel overlay from fields in the AFP data and changes its name, according to the default AFP object type list, to userid.OVERLAY.OVLY38PP.

• If the reblocking program does not recognize the AFP object type, it sets the third qualifier in the sequential output data set to AFPDS. For example if the type of AFP data set is not recognized, the reblocking program uses:

  userid.dsname.AFPDS

  where userid is the user identifier of the person reblocking the document and dsname is the second qualifier of the input data set being reblocked. Therefore, if userid.UNKNOWN.UPLD is reblocked and not recognized by the profile or in the default AFP object type list, the data set is named userid.UNKNOWN.AFPDS. The second qualifier (UNKNOWN) is the same as the data set being reblocked. The third qualifier is always AFPDS.