It doesn't have any value to speak of (no name), but it is still precisely defined.
So a namespace that does have a name can never be used as the default namespace.
Anne Hjortshoj — one of my very smart colleagues — always says…
“UX is all about reducing risk, and revealing value.” We want to help our product teams ensure we are choosing the right problems to solve, and then make sure we are solving them in the right way.
They use a simple XML Schema definition to validate personnel data stored in an XML file.) At the end of this section, you'll also learn how to use an XML Schema definition to validate a document that contains elements from multiple namespaces.
To be notified of validation errors in an XML document, the following must be true: Because JAXP-compliant parsers are not namespace-aware by default, it is necessary to set the property for schema validation to work.
(In general, fully qualified paths are recommended.
In that way, only one copy of the schema will tend to exist.) Note that you cannot use the namespace prefixes when defining the schema locations.
One way we set out to reduce risk is to validate our designs with users so that we figure things out “on paper” vs spending expensive development resources building it.
Now this all sounds great but there are a couple things I think we should keep in mind.
So, there is no question that our design discipline has come a long way in the past 20 years.
In the past we often had to fight tooth and nail in order to be able to do a little bit of research, or testing, and now our design teams are becoming autonomous and have gained the freedom to do all the research and validation that need.
We have have convinced those groups that we can reduce the risk associated with projects if only we can spend time up front validating our designs and our assumptions and we tend to do that by putting paper sketches, wireframes and prototypes in front of real users to understand whether our solutions are meeting their needs.