The Object Constructors are operators that glue monomedia objects into
multimedia units. Two types of constructors are defined :
- <#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.
-
<#2442#> Union<#2442#>:
One of different monomedia objects or multimedia units. The retrieval
of a Union results in the retrieval of just one of its elements.
The Union constructor is particularly useful for the association of more
than one audio stream, all in different languages, with the same video clip.