v1.6.0

• fix issue #34

v1.6.pre1

• fix issue #34

v1.5.0

• Trim XML data by language (#32)
• update grammar

v1.5.pre1

• trim languages in URN identifier

v1.5.pre

• Trim XML data by language

v1.4.1

• fix Place#to_hash function

v1.4.0

• fix issue relaton/relaton-iso#85
• fix issue relaton/relaton-iec#22
• fix XML rnNote redering
• update grammar
• update README

v1.3.1

• fix issue #30

v1.3.0

• add docidentifier[@scope]
• ipmplement to_asciibib #28

v1.2.4

• improve date parsing relaton/relaton-iho#4