Despite sounding very similar, visualizations and display applications are different things - display applications for the most part send or expose Galaxy data to outside sources, visualizations run on the Galaxy server and the client side.
It seems like you are trying to configure a visualization as a display application. I would figure out which you need and base your example plugin on an existing type of that.
More information @
https://wiki.galaxyproject.org/Admin/Tools/External%20Display%20Applications... https://wiki.galaxyproject.org/Learn/Visualization
-John
On Thu, Dec 10, 2015 at 9:32 PM, rbrown1422@comcast.net wrote:
Dear Galaxy Team, I am trying to create my own visualization for a unique datatype but I cannot get past this error in the load. Where is the ID tag assigned for my visualization? Thanks Bob
galaxy.datatypes.registry ERROR 2015-12-10 15:10:13,440 Error loading display application (/home/HM_galaxy/config/plugins/visualizations/heatmap/config/heatmap.xml): ID tag is required for a Display Application Traceback (most recent call last): File "/home/HM_galaxy/lib/galaxy/datatypes/registry.py", line 563, in load_display_applications display_app = DisplayApplication.from_file( config_path, app ) File "/home/rbrown/HM_galaxy/lib/galaxy/datatypes/display_applications/application.py", line 253, in from_file return cls.from_elem( parse_xml( filename ).getroot(), app, filename=filename ) File "/home/rbrown/HM_galaxy/lib/galaxy/datatypes/display_applications/application.py", line 257, in from_elem att_dict = cls._get_attributes_from_elem( elem ) File "/home/rbrown/HM_galaxy/lib/galaxy/datatypes/display_applications/application.py", line 265, in _get_attributes_from_elem assert display_id, “ID tag is required for a Display Application” AssertionError: ID tag is required for a Display Application
The /visualizations/heatmap/config/heatmap.xml file it is complaining about is below and I have a template under /templates
<?xml version="1.0" encoding="UTF-8" ?>
<!DOCTYPE visualization SYSTEM "../../visualization.dtd">
<visualization name="heatmap"> <data_sources> <data_source> <model_class>HistoryDatasetAssociation</model_class> <test type="isinstance" test_attr="datatype" result_type="datatype">text.chm</test> <to_param param_attr="id">dataset_id</to_param> </data_source> </data_sources> <params> <param type="dataset" var_name_in_template="hda" required="true">dataset_id</param> </params> <template>heatmap.mako</template> </visualization>
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