A structure can be selected from, to obtain one of its <#3906#>fields<#3906#> (which in its turn may be a row, a structure or a simple value).
(315,040)<#4641#>
(000,030)<#4531#>selection<#4531#>
The <#3918#>primary<#3918#> must yield a structure, one of whose <#3919#>fields<#3919#> has the <#3920#>field-name<#3920#> as name. The type of the <#3921#>selection<#3921#> is the type of the field yielded. As is the case for the <#3922#>subscription<#3922#>, the <#3923#>selection<#3923#> inherits the access attribute of its <#3924#>primary<#3924#>.