131 lines
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HTML
131 lines
8.4 KiB
HTML
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<meta name="DC.Type" content="concept" />
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<meta name="DC.Title" content="Library lists" />
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<meta name="abstract" content="Library lists are used by the system to locate objects." />
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<meta name="description" content="Library lists are used by the system to locate objects." />
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<meta name="DC.subject" content="library list, part of, current library, product library, system part description, user part, object, accessing, with library list, *CURLIB value" />
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<title>Library lists</title>
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</head>
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<body id="ulibl"><a name="ulibl"><!-- --></a>
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<!-- Java sync-link --><script language="Javascript" src="../rzahg/synch.js" type="text/javascript"></script>
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<h1 class="topictitle1">Library lists</h1>
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<div><p>Library lists are used by the system to locate objects.</p>
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<p>For commands in which a qualified name can be specified, you can omit specifying
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the library name. If you do so, either of the following happens:</p>
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<ul><li>For a create command, the object is created and placed in the user's current
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library, *CURLIB, or in a system library, depending on the object type. For
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example, programs are created and placed in *CURLIB; authorization lists are
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created and placed in the system library, QSYS.</li>
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<li>For commands other than a create command, the system normally uses a library
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list to find the object.</li>
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</ul>
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<p>Library lists used by i5/OS™ consist of the following four parts. </p>
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<dl><dt class="dlterm">System part</dt>
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<dd>The system part of the library list contains objects needed by the system.</dd>
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<dt class="dlterm">Product libraries</dt>
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<dd>Two product libraries may be included in the library list. The system
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uses product libraries to support languages and utilities that are dependent
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on libraries other than QSYS to process their commands. <p>User commands and
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menus can also specify a product library on the PRDLIB parameter on the <span class="cmdname">Create
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Command (CRTCMD)</span> and <span class="cmdname">Create Menu (CRTMNU)</span> commands
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to ensure that dependent objects can be found.</p>
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<p>The product libraries
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are managed by the system, which automatically places product libraries (such
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as QRPG) into the reserved product library position in the library list when
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needed. A product library may be a duplicate of the current library or of
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a library in the user part of the library list.</p>
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<p>For example, assume
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that there is a product library in the library list when a command or menu
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that has a product library starts. The system will replace the product library
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in the library list with the new product library until the new command ends
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or the user leaves the new menu.</p>
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</dd>
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<dt class="dlterm">Current library</dt>
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<dd>The current library can be, but does not have to be, a duplicate of any
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library in the library list. The value *CURLIB (current library) may be used
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on most commands as a library name to represent whatever library has been
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specified as the current library for the job. If no current library exists
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in the library list and *CURLIB is specified as the library, QGPL is used.
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You can change the current library for a job by using the Change Current
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Library (CHGCURLIB) or Change Library List (CHGLIBL) command.</dd>
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<dt class="dlterm">User part</dt>
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<dd>The user part of the library list contains those libraries referred to
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by the system's users and applications. The user part, and the product and
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current libraries, may be different for each job on the system. There is
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a limit of 250 libraries.</dd>
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</dl>
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<p>The following diagram shows an example of the structure of the library
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list:<br /><img src="rbafn557.gif" alt="This diagram shows an example of the structure of the library list." /><br /> </p>
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<div class="note"><span class="notetitle">Note:</span> The system places library QPDA in product library 1 when the source
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entry utility (SEU) is used. When SEU is being used to syntax check source
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code, a second product library can be added to product library 2. For example,
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if you are syntax checking RPG source, then QPDA is product library 1 and
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QRPG is product library 2. In most other system functions, product library
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2 is not used.</div>
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</div>
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<div>
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<ul class="ullinks">
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<li class="ulchildlink"><strong><a href="objuseliblist.htm">Use a library list</a></strong><br />
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Using a library list simplifies finding objects on the system.</li>
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<li class="ulchildlink"><strong><a href="jlibl.htm">A job's library list</a></strong><br />
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Each job's library list consists of up to four parts: a system part, a user part, and the current and product libraries.</li>
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<li class="ulchildlink"><strong><a href="chglibl.htm">Change the library list</a></strong><br />
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You can change the library list in a variety of ways.</li>
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<li class="ulchildlink"><strong><a href="slibl.htm">Considerations for using a library list</a></strong><br />
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You should consider the following when setting up a library list and using it.</li>
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<li class="ulchildlink"><strong><a href="disll.htm">Display a library list</a></strong><br />
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You can use the <span class="cmdname">Display Library List (DSPLIBL)</span> command
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to display the library list for a job currently running. </li>
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<li class="ulchildlink"><strong><a href="objsearchliblists.htm">Search for objects using library lists</a></strong><br />
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You can search for multiple objects in a couple of different ways using library lists.</li>
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</ul>
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<div class="familylinks">
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<div class="parentlink"><strong>Parent topic:</strong> <a href="accob.htm" title="On the iSeries server, objects are grouped in special objects called libraries.">Libraries</a></div>
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</div>
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<div class="relinfo"><strong>Related information</strong><br />
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<div><a href="../cl/crtmnu.htm">Create Menu (CRTMNU) command</a></div>
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<div><a href="../cl/chglibl.htm">Change Library List (CHGLIBL) command</a></div>
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<div><a href="../cl/crtcmd.htm">Create Command (CRTCMD) command</a></div>
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<div><a href="../cl/chgcurlib.htm">Change Current Library (CHGCURLIB) command</a></div>
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<div><a href="../cl/addlible.htm">Add Library List Entry (ADDLIBLE) command</a></div>
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<div><a href="../cl/edtlibl.htm">Edit Library List (EDTLIBL) command</a></div>
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<div><a href="../cl/rmvlible.htm">Remove Library List Entry (RMVLIBLE) command</a></div>
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</div>
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</div>
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</body>
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</html> |