Currently, namespace parameter is required.

If one runs schemats without argument -n (or with empty one) like that :
schemats generate -c postgres://postgres@localhost/osm -t users -o osm.ts

It ends up with the following output in osm.ts :

export namespace undefined {

    export namespace usersFields {
...

Using a namespace for a whole module in typescript is ok, but a bit outdated.
With es2015 modules, it seems preferable to generate directly :

    export namespace usersFields {
...

wich allows to import as following :

import * as myNamespaceInConsumerModule from 'osm.ts'
...

It would be nice to make namespace optional.