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From: "Randy Brukardt" <randy@rrsoftware.com>
Newsgroups: comp.lang.ada
Subject: Re: Default values
Date: Tue, 27 Dec 2016 17:32:57 -0600
Organization: JSA Research & Innovation
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"AdaMagica" <christ-usch.grein@t-online.de> wrote in message 
news:284b95e9-f48a-498f-b3b4-d2dd148fad4a@googlegroups.com...
> See RM 4.3.1. In your case,
>  Latest_Data: Update := (others => <>);
>  Latest_Data: Update;
> mean the same.

Right. Each component is "initialized by default", which for Float and 
subtypes thereof means that they're uninitialized. Probably not what you 
want, but well-defined.

                                    Randy.