Only the first element of the url field is examined and used. This element is used  to make the only attempt to access the external resource. The other elements are ignored. The field remains as an MFString. The browser must handle any Cross-Origin Resource Sharing (CORS) issues that may arise. Note that there may be no support for a local reference, depending on the JavaScript sandbox model adopted by the browser in use.

The browser options described in Table 9.2 - Browser options are defined. Support is optional, but recommended. These are passed to the X3D browser through attributes in the x3d element in the HTML file.

Need to describe Browser options. This probably goes on the <x3d> tag when used with the HTML profile.

IMPORT statement is not required, but may be used to create an alias for nodes in an Inline file.

EXPORT statement is not required, but may be used to create an alias for the nodes in a file that is Inlined.

All Inline files have all node names (DEF names) and id attributes exposed in the DOM.