ONXADD Add Files to Library

Delta Format PLAM Elements:

Delta storage of elements means that only the changes to the previous version are stored. The Delta storage technique results in a greatly reduced space requirement in comparison to the full storage of all versions of the elements. LMS Version 1.4 or above is necessary to process delta format elements properly.

If an element is copied from another library, or if a file is added with ONXADD to a PLAM library, then the following cases can be distinguished for Delta storage:

1) The CA (Copy All) parameter is specified with the ONXADD Variable Action. In this case, all versions of a delta format element will be copied to the target library, structurally intact. The following points 2) and 3) are relevant if the CA parameter is not specified (Standard).

2) An element already exists in the target library with the specified name and element type. In this case, the storage format of the existing element is retained, and the following possibilities exist:

a) The element is stored as a full element (i.e. not in delta format). The existing element is overwritten by the identically named new element, so long as no differing version numbers exist.

b) The element is stored in delta format. The new element or file is added as a new version on the existing delta tree with the version number being incremented. The old element is thus not overwritten, and may still be retrieved.

3) The target library does not contain any element with the specified name. In this case, the following possibilities exist:

a) The element to be transferred is stored in non-delta format. The element will thus also be created in the target library in non-delta format.

b) The element to be transferred is stored in delta format.

- The element is created in the target library in non-delta format if the DELTA User Option was not specified when selecting the original library.

- The element is created in the target library in delta format if the DELTA User Option was specified when selecting the source library. A full description of the DELTA User Option may be found on page 4-.