CSECT entry names
A symbol can be used as the qualname operand of the csect pseudo-op.
A symbol can also be defined when used as the qualname operand of the .csect pseudo-op. When used in this context, the symbol is defined as the name of a csect with the specified storage mapping class. Once defined, the symbol takes on a storage mapping class that corresponds to the name qualifier.
A qualname operand takes the form of:
symbol[XX]
OR
symbol{XX}
where XX is the storage mapping class.