Actually, in Datomic, the namespaces don't have any special meaning for the
database itself--you can choose to use whatever namespace (or even no
namespace)! Using namespaces is a convention to help you keep track of
which attributes belong to which entities.
We don't use a separate model layer for our systems--the Datomic APIs are
actually pretty rich when it comes to manipulating the system, between the
transactions as data and the entity API.
On Sunday, April 5, 2015 at 11:32:50 AM UTC-4, Stig Brautaset wrote:
>
> I have a question regarding using Datomic from Clojure, but I think it's
> more of a Clojure question than a Datomic question
>
> I understand that you must use namespaces in idents for logically distinct
> types of entities. (Unless you intend them to be lumped together in the
> same index.) Thus the :ids in two entities below don't conflict:
>
> {:foo/id 1
> :name "Name of a Foo"}
>
> {:bar/id 1
> :desc "Bar's don't have names, they have desc"}
>
> So far so good.
>
> My question is: do you expose this namespacing outside the model layer
> when working in Clojure? I'm inclined to say that this namespacing is an
> implementation detail of the database and so add/remove them in the model
> layer. I would love to hear your opinions.
>
> Stig
>
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