Re: [mdmbl-dev] Reading MF4 files with org.eclipse.mdm.openatfx.mdf

[David Kolb <david.kolb@xxxxxxxxx>]

Hi Angelika,

thanks for the quick answer.

Could you tell us which context you are working?

We are developing a data analysis tool called KNIME Analytics Platform. It has a visual interface where you can build so called workflows that model a data pipeline with operations on the data modelled as nodes. Some users from our community would be interested in a node to read MDF files in our tool and do some analysis on the measurement data. As our tool is written in Java, I was investigating possible Java libraries that we could use to read MDF and that we could integrate.

Are you interested in the openatfx.mdf code or in the underlaying openatfx driver?

Actually, I'm not 100% sure. If I understood correctly, openatfx.mdf provides functionality to read MDF files using the openatfx driver? However, I was having troubles reading the actual measurement data from the a MF4 file. I cloned this repository and had a look at the test cases. Specifically I have the following questions:

1) Is there an example/test case where the actual measurement data is read from the file?

2) I'm confused about the keys that are used to retrieve ApplicationElements and InstanceElements from the ApplicationStruture. Is there some resource describing how to access the file and where the keys come from? I tried to compare it to the keys shown by the MDFValidator by VECTOR but they do not seem to match.

3) I'm unfamiliar with the ASAM OO-API and I couldn't find a guide to the API. Also I couldn't find sources and JavaDoc for the ods-5.3.0.jar to view this information in Eclipse while looking at the tests.

Thanks for your help,

David

Am 07.03.2019 um 09:39 schrieb Angelika Wittek, openMDM(R):

Dear David,

yes this is the right place to ask questions about the Eclipse mdmbl project. Currently we are busy, so an answer will be delayed up to next week.
Are you interested in the openatfx.mdf code or in the underlaying openatfx driver? That library is hosted on sourgeforge by Christian:
https://sourceforge.net/projects/openatfx/

Could you tell us which context you are working? Our project is associated with the Eclipse openMDM Working Group and we are always interested about the use cases of our users.

Thanks
Angelika

-- 
openMDM(R) EWG product manager

mail: awittek.openMDM@xxxxxxxxxxxxxxxxxx
phone: +49 1577 1900802 

Am 06.03.19 um 10:21 schrieb David Kolb:

Dear MDM|BL Development Team,

I'm a working student at the company KNIME and I'm currently investigating Java libraries which provide functionality to read MF4 files. We'd like to include this functionality into our open source software.

After some search, I stumbled upon: https://git.eclipse.org/c/mdmbl/org.eclipse.mdm.openatfx.mdf.git/about/ which lead me to this mailing list in the included NOTICE.txt of the Git repository. As the author of the project is marked as Christian Rechner, AUDI AG (here), I was confused who to contact regarding some questions about the usage of the library. Specifically, I am having troubles reading the actual numeric content of some MF4 files, finding examples, and finding documentation about the ASAM OO-API.

If this is not the right place to ask these questions, could you maybe point me into the right direction? Otherwise, I would be happy to elaborate on my questions and very thankful about your support.

Kind regards,

David Kolb

_______________________________________________
mdmbl-dev mailing list
mdmbl-dev@xxxxxxxxxxx
To change your delivery options, retrieve your password, or unsubscribe from this list, visit
https://www.eclipse.org/mailman/listinfo/mdmbl-dev

_______________________________________________
mdmbl-dev mailing list
mdmbl-dev@xxxxxxxxxxx
To change your delivery options, retrieve your password, or unsubscribe from this list, visit
https://www.eclipse.org/mailman/listinfo/mdmbl-dev