see: https://docs.intersystems.com/iris20241/csp/docbook/Doc.View.cls?KEY=RGOT_complete

browser search "Extent Index"

$ZTRAP is pretty much the same idea as ONERROR that you find in
BASIC, VB, VBA, JavaScript  and some other old languages.  
a left over from M
 

in docker-compose.yml

change

command: --key /dur/key/iris.key

to

command: --key /dur/key/iris.key -b "sleep 2000" 

so the container starts but IRIS is not started
2000 is just some hang for your investigation (2000 sec)

in a 2nd session run

docker-compose exec iris bash

and start IRIS manually to see all details of what might be wrong
 

I share your suspicion on reserved Verbs.

You may try 

m.Name as "myName"

Or even

m.Name as "Name"

Just a guess from the  hip

first you need to install a valid DSN: Defining an ODBC Data Source on Windows
for PS you may take the same approach as described here

Wrap your SELECT in an Outer  SELECT LIST(...inner select ...)
try:

SELECT LIST(DIAGNOSE) FROM (
 SELECT MRDIA_.....->MRCID....
 FROM ......
 WHERE .....
 ORDER BY ......
)

What you describe is indeed named Global:
and the syntax could be  ^ehr.IP to follow your question.
It is visible over the whole namespace.
If you use ^%ehr.IP the % makes it available over all namespaces of your installation.

Set ^%ehr.IP="whatever you need" is creating it   
 

@Enrico Parisi :  I fully support your point!
Global mapping - in any form - is the path for CONTROLLED managed growth.
So I wonder about the intention of the "continuation". 

A quite interesting feature.
Did you take a look on how backup management is affected / involved by this design ? 
I just fail to imagine how to keep all this in synch.
e.g. if spread over several drives:
Are they backed up in total or in volume junks ?

Sorry: my typo:   zipcode.csp  generates  csp.zipcode.CLS

<script language="cache" method="AlertUser">  
this generates the method.
But your CSP page works with HTML + js in your Browser
to the Browser that interprets and call just as JS.

BTW: old CSP pages
YES, this hasn't changed since it was fresh ~22 years ago (my 1st training docu @ISC)
and NO browser ever accepted ObjectScript as scripting language.
the <script language="cache"  ...> tag is just a compiler directive and never reaches  the browser.

Principal limit: HTML just knows about JavaScript
JavaScript is executing an XHTML call to your Ensemble carrying along all required credentials.
e.g. sessionid,  encryption, cookies, ....
In your namespace SAMPLES zipcode.cls ia a detailed example,
your call looks like this;

#server(..validateZipCode(zipcode))#

But the generated code is this:

("cspHttpServerMethod")_"('"_(..Encrypt($listbuild($classname()_".validateZipCode"))_$select(%session.UseSessionCookie'=2:"&CSPCHD="_%session.CSPSessionCookie,1:""))_"',zipcode)",!

HTML has no idea about all this

 

OOUHH. Weblink had end of life more than 20 years ago
It was the unloved predecessor of CSP. 

Win authentication is something
IRIS authentication is something else.
They rarely match each other.