Incorrect output

[chrdebru]

Not sure whether this is an RMLMapper problem or a Matey problem, but I have noticed the following:

Input:

<tasks>
  <task>
    <task_id>1</task_id>
    <description lang="en">Design Mockups</description>
    <description lang="fr">Concevoir des maquettes</description>
  </task>
  <task>
    <task_id>2</task_id>
    <description lang="en">Develop Frontend</description>
    <description lang="fr">Développer le frontend</description>
  </task>
  <task>
    <task_id>3</task_id>
    <description lang="en">Develop Backend</description>
    <description lang="fr">Développer le backend</description>
  </task>
</tasks>

Mapping:

 ex: "http://example.com/"

mappings:
  person:
    sources:
      - ['source_1.xml~xpath', '/tasks/task']
    s: http://example.com/task/$(task_id)
    po:
      - [ex:description, $(description), $(description/@lang)~lang]

Output:

@prefix ex: <http://example.com/> .

<http://example.com/task/1> ex:description "Concevoir des maquettes"@en, "Design Mockups"@en .

<http://example.com/task/2> ex:description "Develop Frontend"@en, "Développer le frontend"@en .

<http://example.com/task/3> ex:description "Develop Backend"@en, "Développer le backend"@en .

The French labels do not have the correct language-tag.

If I change the first lang attribute to "it," both descriptions have the it language tag:

<http://example.com/task/1> ex:description "Concevoir des maquettes"@it, "Design Mockups"@it .

It thus keeps the lang attribute from the first description.