progress 4gl OpenEdge parse key/value-pair string aka Query-String

I cant find anything on how i should parse a string of key/value paris AKA query-string like this one:

FieldType="String"&FieldFormat="^[a-z0-9!#$%&'*+/=?^_`{|}~-]+$"


field separators might be contained in the value like the above example this is not to be used as a web-request paramlist.

i found this: running a loop on a comma delimited list of items progress 4GL

but entry() does not care if the data is in a qoutation.

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