urn5s_as_properties--benja

In the RDF/XML serialization of RDF, all properties are turned into XML tags by separating them into an XML namespace and a local part. For example, http://example.org/foo could become:

<ex:foo xmlns:ex="http://example.org/"/>

When properties cannot be split like this, RDF graphs using these properties cannot be serialized in RDF/XML. Unfortunately, this apparently includes urn-5s: The colon can't occur in an XML tag in a namespace, and a tag's name cannot start with a digit.

Even if we decide not to use RDF/XML, it would still be very bad for interoperability if our graphs couldn't be converted to RDF/XML. And we do want user-created nodes to be usable as properties.

Therefore, add an additional underscore before the index in urn-5s, like this:

urn:urn-5:cf7O9Un3XBIVdh3rYqH0us169zo-:_12

Then we can serialize these as properties:

<ex:_12 xmlns:ex="urn:urn-5:cf7O9Un3XBIVdh3rYqH0us169zo-:"/>

The urn-5 registration allows for this.

- Benja