--- /dev/null
+How about using tags/links to associate attributes with requirements?
+This could be as simple as adding a link, fo e.g. :
+
+ * If it is traceable or not
+ + \[[attributes/traceable]]
+ + \[[attributes/untraceable]]
+ * Its criticality level
+ + \[[attributes/level/critical]]
+ + \[[attributes/level/important]]
+ + etc.
+ * Its priority
+ + \[[attributes/priority/low]]
+ + \[[attributes/priority/high]]
+ * If it is functional or not
+ + \[[attributes/functional]]
+ + \[[attributes/non-functional]]
+
+You just have to create pages for each attribute you want and then pagespec could be used to filter requirements by attributes. I think something similar is used to trac bug with ikiwiki (linking to a \[[done]] page, etc.).