Invalid selfclosing <em/> tag in exported html when enclosing inline nodes

[dannelundqvist]

When enclosing to inline nodes (a elements) in one annotation (em, strong...) the export produces a self closing element not valid in html.

Steps to reproduce

1. Create two links
2. Select the two links
3. Select an annotation as em

The result is invalid html

Possibly related to #375

[dannelundqvist]

In addition all em tags above share the same id which also is invalid html.

[olaanders]

And when loading the document with the duplicated "id" attributes in substance, these elements get deleted.

[obuchtala]

Thanks for reporting. Will work on this.

[obuchtala]

The empty artifact element is easy to fix.
However @olaanders mention is much worse.
@dotvoid How many freedom is there to store an attribute to link to the master element?

Other alternatives:

• drop ids at all for such 'unimportant' elements
• use ids with a ...#<number> suffix

[obuchtala]

BTW, have you been using an XML exporter (i.e. with an XML DO)?