The Object Constructors are operators that glue monomedia objects into
multimedia units. Two types of constructors are defined :
The Union constructor is particularly useful for the association of more
than one audio stream, all in different languages, with the same video clip.
- <#2441#> Record<#2441#>:
A group of different monomedia objects or multimedia units that form
together a new multimedia unit. The retrieval of a Record results in the
retrieval of all its elements.
One of different monomedia objects or multimedia units. The retrieval
of a Union results in the retrieval of just one of its elements.