Taverna 2.x uses MIME magic to “guess” the MIME type of the output, and based on that renders the result. This means that you do not have to specify the MIME type of the output port, as was the case in Taverna 1.x.
Taverna will always make available all possible renderers for a particular output result. For example, if your output is an XML text – you would be able to see the plain XML text as well as the XML tree.
In Taverna 1.7.x, you can manually add multiple MIME types to a workflow output port (to be used by the output renderers) by selecting the output and going to “Metadata for ‘myoutputport’” – under “MIME types”. For example, for SVG add
image/svg+xml
This should enable the SVG renderer for the output port. You might need to right click on the value in the left hand column and select “SVG” instead of “Text”.
