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-rw-r--r--lib/opentox.rb3
1 files changed, 2 insertions, 1 deletions
diff --git a/lib/opentox.rb b/lib/opentox.rb
index 68a841b..554e686 100644
--- a/lib/opentox.rb
+++ b/lib/opentox.rb
@@ -15,7 +15,8 @@ module OpenTox
field :title, type: String
field :description, type: String
- field :parameters, type: Array
+ field :parameters, type: Array, default: []
+ field :creator, type: String
# TODO check if needed
def self.subjectid