Object Constructors

The Object Constructors are operators that glue monomedia objects into multimedia units. Two types of constructors are defined :
  1. <#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.
  2. <#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.