Differences between a 'local name' and 'qualified name' in a xml attribute

Question

Can you please help me understand what is the difference between \'local name\' and \'qualified name\' in a xml attribute? From http://developer.android.com/reference/org/xml/sa

Answer 1

The qualified name includes both the namespace prefix and the local name: att1 and foo:att2.

Sample XML

Java Code:

att1

Attributes without a namespace prefix do not pick up the default namespace. This means while the namespace for the root element is "http://www.example.com/DEFAULT", the namespace for the att1 attribute is "".

int att1Index = attributes.getIndex("", "att1");
attributes.getLocalName(att1Index);  // returns "att1"
attributes.getQName(att1Index);  // returns "att1"
attributes.getURI(att1Index);  // returns ""

att2

int att2Index = attributes.getIndex("http://www.example.com/FOO", "att2");
attributes.getLocalName(att2Index);  // returns "att2"
attributes.getQName(att2Index);  // returns "foo:att2"
attributes.getURI(att2Index);  // returns "http://www.example.com/FOO"