Copying from a CD-ROM Volume Mounted on a CD Unit

In the usual way, LIBRARY/MAINTENANCE can copy files from a LIBRARY/MAINTENANCE CD mounted on a CD unit, by setting the <source volume> KIND to CD in the COPY statement.
However, LIBRARY/MAINTENANCE does not copy files from other file systems which may reside on a hybrid LIBRARY/MAINTENANCE CD volume, nor does it copy files from an ISO9660 Data CD mounted on a CD unit. The A-Series does not recognize the JOLIET file system.
The file systems supported by COPYWRITE are given names, so that they can be selected as the target file system for a COPY.
The names of the file systems supported by COPYWRITE are LMCD, JOLIET and ISO9660.
LMCD refers to the underlying modified ISO9660 format used by LIBRARY/MAINTENANCE. The first file on an LMCD volume is called *FILE000, and contains the Tape Directory. Each subsequent file is called *FILExxxxx, starting with FILE00001, and each file contains LIBRARY/MAINTENANCE blocks, preceded by a 2 byte length field, and followed by a 6 byte A-Series CheckSum. These files can be copied if the file system is specified as LMCD.
COPYWRITE preserves the A-Series convention in which a file called *USERCODE/<username>/... refers to an A-Series file called (<username>)... The top level of a JOLIET or ISO9660 volume is by convention the equivalent of the * directory on the A-Series. When COPYWRITE copies usercoded files to an ISO9660 Data CD-ROM archive volume, it copies them as *USERCODE/<username>/...
The target file system is selected by setting the SCRATCHPOOL attribute of the <source volume> to one of LMCD, JOLIET or ISO9660.
If the <source volume> of a COPY is CD, and the SCRATCHPOOL attribute is not set, then the LIBRARY/MAINTENANCE file system is assumed, and LIBRARY/MAINTENANCE is called to copy the files.
The most important factor to consider when copying a file from an ISO9660 or JOLIET file system, is what attributes should the file have applied when it is copied to the A-Series ? COPYWRITE provides the means to copy these files with a FILESTRUCTURE of STREAM or ALIGNED180, as FRAME stream files or RECORD stream files, to coerce them to a FILEKIND. These features are the same whether the file is being copied from a CD unit or an archive volume. See Example 21 through Example 25.