# Questions on EHR implementation
**URL:** https://discourse.openehr.org/t/questions-on-ehr-implementation/14668
**Category:** Technical (archive)
**Created:** [16 October 2007 18:06 UTC](https://discourse.openehr.org/t/questions-on-ehr-implementation/14668 "2007-10-16T18:06:55Z")
**Posts on this page:** 13
**Page:** 1
### Author:  [@Mike\_Bullen](https://discourse.openehr.org/u/Mike_Bullen)
#### Post date: [16 October 2007 18:06 UTC](https://discourse.openehr.org/t/questions-on-ehr-implementation/14668/1 "2007-10-16T18:06:55Z")
GlobalHealthUSA would like to design and implement an EHR system for their disease management system platform. We would like to use OpenEHR but have the following questions:
1. Can OpenEHR be implemented in a windows(MS) .NET environment?
2. Can OpenEHR be used to develop an ISP version so several doctors can use it?
3. Has any one done such an implementation before, if so is there any web documentation?
4. Can we use our existing SQL 2005(MS) database?
5. Is there an existing client used to access OpenEHR?
6. What do we need to download and from where?
Thank you
Mike Bullen 
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### Author:  [@system](https://discourse.openehr.org/u/system)
#### Post date: [16 October 2007 23:46 UTC](https://discourse.openehr.org/t/questions-on-ehr-implementation/14668/2 "2007-10-16T23:46:32Z")
What you want to see is here.
[http://www.openehr.org/projects/t\_projects.htm](http://www.openehr.org/projects/t_projects.htm)
---
### Author:  [@system](https://discourse.openehr.org/u/system)
#### Post date: [18 October 2007 07:33 UTC](https://discourse.openehr.org/t/questions-on-ehr-implementation/14668/3 "2007-10-18T07:33:31Z")
Mike
Ocean has implemented openEHR in the .Net environment. I will send you the documentation.
Cheers, Sam
Mike Bullen wrote:
> **(attachments)**
>
> 
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### Author:  [@Javier\_Valdes](https://discourse.openehr.org/u/Javier_Valdes)
#### Post date: [18 October 2007 16:39 UTC](https://discourse.openehr.org/t/questions-on-ehr-implementation/14668/4 "2007-10-18T16:39:24Z")
Please include this address when you send the documentation to Mr. Bullen. Many thanks.
JV
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### Author:  [@Eddy\_Rospide](https://discourse.openehr.org/u/Eddy_Rospide)
#### Post date: [18 October 2007 19:41 UTC](https://discourse.openehr.org/t/questions-on-ehr-implementation/14668/5 "2007-10-18T19:41:28Z")
Hi Sam,
Could you email me the documentation as well? I have been very interested in this for a long time and even tried to volunteer to help write the code.
Thanks,
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### Author:  [@system](https://discourse.openehr.org/u/system)
#### Post date: [19 October 2007 09:43 UTC](https://discourse.openehr.org/t/questions-on-ehr-implementation/14668/6 "2007-10-19T09:43:37Z")
Hi Eddy,
Besides the .Net C# implementation by Ocean, there is an open source implementation in Java. It is not as complete or advanced as the Ocean implementation, but it does provide the Java implementation of nearly all published specifications. More details see the project page: [http://svn.openehr.org/ref\_impl\_java/TRUNK/project\_page.htm](http://svn.openehr.org/ref_impl_java/TRUNK/project_page.htm)
There is an active community gathered around the Java project, from both academic and commercial side. You are welcome to contribute to the Java project.
Cheers,
Rong
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### Author:  [@Peter\_Gummer1](https://discourse.openehr.org/u/Peter_Gummer1)
#### Post date: [19 October 2007 10:44 UTC](https://discourse.openehr.org/t/questions-on-ehr-implementation/14668/7 "2007-10-19T10:44:51Z")
Rong Chen wrote:
> Besides the .Net C# implementation by Ocean ...
Note that Ocean's .NET implementation is not only in the C# language: it is
also in the Eiffel language.
- Peter
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### Author:  [@system](https://discourse.openehr.org/u/system)
#### Post date: [19 October 2007 11:01 UTC](https://discourse.openehr.org/t/questions-on-ehr-implementation/14668/8 "2007-10-19T11:01:13Z")
Yes, Peter you are right! Sorry for the overlook.
And the Eiffel implementation is also open source - project page at: [http://svn.openehr.org/ref\_impl\_eiffel/TRUNK/project\_page.htm](http://svn.openehr.org/ref_impl_eiffel/TRUNK/project_page.htm)
/Rong
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### Author:  [@system](https://discourse.openehr.org/u/system)
#### Post date: [21 October 2007 20:25 UTC](https://discourse.openehr.org/t/questions-on-ehr-implementation/14668/9 "2007-10-21T20:25:49Z")
Peter Gummer schreef:
> Rong Chen wrote:
>
> > Besides the .Net C# implementation by Ocean ...
>
> Note that Ocean's .NET implementation is not only in the C# language: it is
> also in the Eiffel language.
>
> - Peter
>
> \_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_
> openEHR-technical mailing list
> openEHR-technical@openehr.org
> [http://lists.chime.ucl.ac.uk/mailman/listinfo/openehr-technical](http://lists.chime.ucl.ac.uk/mailman/listinfo/openehr-technical)
In so far, not because I like to disagree, but regrettable, many of the
function/method-bodies in the Eiffel-code are empty. Eiffel seems merely
to be/have been used as a kind of case-tool instead of really building
a openehr kernel-implementation.
Which is a good use for Eiffel, but it is something else then writing an
implementation
Check here: [http://svn.openehr.org/ref\_impl\_eiffel/TRUNK/libraries/openehr](http://svn.openehr.org/ref_impl_eiffel/TRUNK/libraries/openehr)
One must take care when reading the this code because Eiffel supports
multiple inheritance, which is not supported by Java or C#. So
translating the Eiffel-skeleton to Java or C# causes at some places
code-redundancy and tricky coding.
But besides that Openehr is a great concept, and Ron's Java-kernel is a
great piece of work, the C# kernel is to, I am sure, it is build close
to the source of design.
I am building a Java-implementation too, based on Rong's kernel, he has
solved many problems and set directions, I am now using, and extending
this to an (for my purpose) applicable product.
kind regards,
Bert Verhees
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### Author:  [@Peter\_Gummer1](https://discourse.openehr.org/u/Peter_Gummer1)
#### Post date: [21 October 2007 23:06 UTC](https://discourse.openehr.org/t/questions-on-ehr-implementation/14668/10 "2007-10-21T23:06:33Z")
Bert Verhees wrote:
> In so far, not because I like to disagree, but regrettable, many of the
> function/method-bodies in the Eiffel-code are empty. Eiffel seems merely
> to be/have been used as a kind of case-tool instead of really building
> a openehr kernel-implementation.
> Which is a good use for Eiffel, but it is something else then writing an
> implementation
I don't know what you're referring to, Bert. The Eiffel code has most
definitely been written as an implementation. We are using it. ADL Workbench
is built entirely in Eiffel. The Ocean Archetype Editor, which is written in
VB.NET, uses the Eiffel kernel classes in the form of a .NET assembly.
Maybe you've been looking at the Eiffel code via EiffelStudio's "contract"
or "interface" views: these views hide the implementation of the classes.
- Peter
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### Author:  [@system](https://discourse.openehr.org/u/system)
#### Post date: [22 October 2007 07:13 UTC](https://discourse.openehr.org/t/questions-on-ehr-implementation/14668/11 "2007-10-22T07:13:18Z")
> Bert Verhees wrote:
>
> > In so far, not because I like to disagree, but regrettable, many of the
> > function/method-bodies in the Eiffel-code are empty. Eiffel seems merely
> > to be/have been used as a kind of case-tool instead of really building
> > a openehr kernel-implementation.
> > Which is a good use for Eiffel, but it is something else then writing an
> > implementation
>
> I don't know what you're referring to, Bert. The Eiffel code has most
> definitely been written as an implementation. We are using it. ADL
> Workbench
> is built entirely in Eiffel. The Ocean Archetype Editor, which is written
> in
> VB.NET, uses the Eiffel kernel classes in the form of a .NET assembly.
>
> Maybe you've been looking at the Eiffel code via EiffelStudio's "contract"
> or "interface" views: these views hide the implementation of the classes.
>
> - Peter
Sad is that I cannot get the EiffelStudio (Linux-version) to run on my
Linux-machine, some vague errors and nothing to find on the Internet.
The ADLworkbench has another problem, in Wine, it does not refresh the
treeviews (after clicking on it). Too bad, both things, so I don't use
them both, which I regret. But I hate working on Windows. There are other
advantages on my Linux-environment which I enjoy very much.
---
### Author:  [@system](https://discourse.openehr.org/u/system)
#### Post date: [22 October 2007 17:58 UTC](https://discourse.openehr.org/t/questions-on-ehr-implementation/14668/12 "2007-10-22T17:58:49Z")
> \
> I must have looked at the wrong place, excuse me for my mistake.
I checked some more files, I find many empty function bodies
Like this
- -----------------
set\_historical\_state (dt: DV\_DATE\_TIME) is
---
### Author:  [@system](https://discourse.openehr.org/u/system)
#### Post date: [22 October 2007 22:32 UTC](https://discourse.openehr.org/t/questions-on-ehr-implementation/14668/13 "2007-10-22T22:32:58Z")
Peter Gummer schreef:
> Bert Verhees wrote:
>
> > So I was looking at the website, I did (also in the past) take a look in
> > the SVN TRUNK tree, because I wanted to check something, I use it as a
> > case tool, so for me it is no problem. Yesterday I looked at three files,
> > all had empty function bodies (f.e. ) in composition.e which is a rather
> > crucial file.
> >
> > Take a look yourself:
> > [http://svn.openehr.org/ref\_impl\_eiffel/TRUNK/libraries/openehr/src/rm/composition/composition.e](http://svn.openehr.org/ref_impl_eiffel/TRUNK/libraries/openehr/src/rm/composition/composition.e)
>
> That class, like most classes in the "rm" cluster, isn't compiled into
> ADL Workbench or our .NET DLL. I'm not sure why. Sounds like a question
> for Thomas 😉
That is why you can't really talk of an available reference
implementation in Eiffel, but it is a skeleton for case-tool-purposes
Bert