The concatenation sequence used by ISPF to find the member for input to the Linkage Editor is:

project-name.lib1-name.type
project-name.lib2-name.type
(and so forth)

where type is whatever you specify on the panel. For example, it can be OBJ or some other type containing Linkage Editor language (LEL) control statements. If the type is not OBJ, an OBJECT DDNAME is automatically allocated to ease the use of these Linkage Editor control statements:

INCLUDE OBJECT(member-name)

For example:

Project . . . XYZ
Group . . . . MYLIB   . . . MASTER  . . .          . . .
Type  . . . . LEL
Member  . . . TOP

In this example, ISPF searches data sets XYZ.MYLIB.LEL and XYZ.MASTER.LEL to find member TOP, which should contain LEL control statements. Also, ISPF allocates to DDNAME OBJECT (DISP=SHR) these concatenated sequence of object libraries:

XYZ.MYLIB.OBJ
XYZ.MASTER.OBJ

This concatenated sequence is searched by the Linkage Editor if member TOP contains INCLUDE OBJECT(member-name) statements. The concatenation sequence passed to the Linkage Editor by way of the LIB parameter has a type qualifier of LOAD and includes the system libraries you specify, as follows:

LIB('project-name.lib1-name.LOAD',
    'project-name.lib2-name.LOAD',
 ⋮
    and so forth,
 ⋮
    'syslib1-name',
 ⋮
    and so forth)