codemeta:identifier does not allow propertyvalues (source: https://github.com/codemeta/codemeta/blob/master/codemeta.jsonld#L36 ; `"@type": "@id"` means the value must be a URI, but propertyvalues are not URIs), so we need to replace:
<codemeta:identifier>
<codemeta:type>schema:PropertyValue</codemeta:type>
<schema:propertyID>HAL-ID</schema:propertyID>
<schema:value>hal-02527759</schema:value>
</codemeta:identifier>
with this:
<schema:identifier>
<codemeta:type>schema:PropertyValue</codemeta:type>
<schema:propertyID>HAL-ID</schema:propertyID>
<schema:value>hal-02527759</schema:value>
</scehma:identifier>