It is sometimes useful to put test data into a separate file (e.g. a CSV file).
You can use the magic variable "#HREF" to let your fixture code
know the URL of an anchor.
Note, however, that having separate test data tends to be a "bad smell" suggesting that your test is too implementation-specific and/or covers too many things.
The following instrumentation:
<a href="blah.csv" concordion:execute="#x = myMethod(#HREF)">test file</a> <span concordion:assertEquals="#x">blah.csv</span>
Will execute myMethod() in the Java fixture code and pass in the parameter "blah.csv" as #HREF.
If myMethod() simply returns the value it receives, then the assertEquals should
succeed.