Function getNamespaceBase

getNamespaceBase(
namespace: { "": string; readonly [term: string]: string },
): Optional<string>
Retrieves the base identifier of a namespace.

Returns the scheme and authority components of the namespace IRI, as extracted by getIRIBase. The result is a base identifier suitable for resolving references against the IRIs minted by the namespace.
Parameters
- namespace: { "": string; readonly [term: string]: string }
  The namespace to retrieve the base identifier from
Returns Optional<string>
The base identifier of the IRI of namespace, terminated by a trailing slash, or undefined if the namespace IRI is opaque, that is not a hierarchical identifier (for example, urn:example:)
Example
```
getNamespaceBase(createNamespace("http://example.org/a/ns#"));  // "http://example.org/"
getNamespaceBase(createNamespace("urn:example:"));              // undefined
```
See
- Defined in standards/resource.ts:823