fix(rdfa-parser): correctly parse older-style literal nodes

Author: elpoelma

.changeset/twelve-experts-pick.md

@@ -0,0 +1,5 @@
+---
+'@lblod/ember-rdfa-editor': patch
+---
+
+Add extra check to `postProcessTagAsRdfaNode` function to correctly parse older style literal nodes

packages/ember-rdfa-editor/src/utils/_private/rdfa-parser/post-process-as-rdfa-nodes.ts

@@ -120,7 +120,9 @@ export function postProcessTagAsRdfaNode<N>(args: PostProcessArgs<N>): void {
       } else {
         if (
           truthyAttribute(attributes, 'about') &&
-          !truthyAttribute(attributes, 'data-literal-node')
+          !truthyAttribute(attributes, 'data-literal-node') &&
+          // Is this correct, an alternative solution would be to check on the presence of a `resource` attr here?
+          !truthyAttribute(attributes, 'datatype')
         ) {
           // same exception as above, we always interpret (property +about -content) cases as literal nodes
           markAsResourceNode(