Re: [xml-dev] Do not use the same tag name for different things ...Do yo

[David Carlisle <d.p.carlisle@gmail.com>]

<Items>
    <Aquarium>
        <Tank>40 gallon capacity</Tank>
    </Aquarium>
    <Abrams>
        <Tank>M-1A2C</Tank>
    </Abrams>

</Items>

is valid against

start = items

items = element Items {thing*}

thing = ( pet-house |  vehicle )

pet-house = aquarium

aquarium = element Aquarium { fish-tank }

# add more pet houses here
 
fish-tank = element Tank {text}

vehicle = abrams

# add more vehicles here

abrams = element Abrams { battle-tank }

battle-tank = element Tank {text}
   

On Fri, 21 Jan 2022 at 17:06, Roger L Costello <costello@mitre.org> wrote:

David Carlisle wrote (paraphrasing):

> The fact that you cannot have two different global declarations
> of a Tank element is a limitation of XML Schemas.  Other
> constraint languages do not have the limitation.

Wow!

> If you use Relax NG you can globally declare  tank-fish and
> tank-military patterns that both use the same element name,
> but each used in their respective contexts.

Wow!

I haven't done anything with Relax NG for a long time. Would someone show Relax NG code that creates two "Tank" elements (an aquarium tank and a military tank) without violating DRY (Don't Repeat Yourself), please?

/Roger