- Goal: to address into and XML document
- In HTML, one could use:
"http://a.b.c#q
- this remains valid!
- A more general framework is defined:
"http://a.b.c#scheme1(desc1) scheme2(desc2)"
- where
scheme1 and scheme2 are various schemes
- also referred to as fragment identifiers
- schemes are evaluated left-to-right until match
