Two more test archteype for testing metadata elements on archetype id line. These parse properly. Serialised flattened output (dadl) - see 'other_metadata':

(P_ARCHETYPE) <
	original_language = <[ISO_639-1::en]>
	description = <
		original_author = <
			["name"] = <"thomas.beale@oceaninformatics.com">
		>
		lifecycle_state = <"Initial">
		other_details = <
			["regression"] = <"PASS">
		>
	>
	artefact_object_type = <"DIFFERENTIAL_ARCHETYPE">
	archetype_id = <"openehr-TEST_PKG-WHOLE.child_with_uid_and_other_metadata.v1">
	other_metadata = <
		["child_flag"] = <"true">
		["some_key"] = <"some_replacement_value">
		["child_key"] = <"xxxxx">
	>
	adl_version = <"1.5">

See most recent adl-tools changes.