A couple of points concerning this form: 1) When the adjective substitutes a noun it is required. If I got this right this means that in the following construction you have to use the longer form. - Za koga si govorio? - Za visokoga. (btw I just came up with this example - I didn't read it in a book, so it may sound totally weird. I was looking for an example with a case where the distinction between long and longer form is clear) 2) It is used for emphasis 3) It is used more in Croatian (in her final sociolinguistic commentary R. Alexander says that Croatians would rather say Gramatika francuskoga jezika than Gramatika francuskog jezika) 4) Also in Croatian the -e extension in Dat/Loc Sing carries locative meaning while the -u extension carries dative meaning Are these points correct and is there something else I should know about this particular form? Thank you.