Merge pull request #28 from DanSmith/master

fix instrumentgroup cardinality

ItemTypes/InstrumentGroup/InstrumentGroup.csv

@@ -7,6 +7,6 @@ UniverseReference,Universe,0,n,Reference to the universe statement describing th
 ConceptReference,Concept,0,1,Reference to the concept expressed by the objects in this group.,,,,,,,,,,,ddi:reusable:3_3,e,
 Subject,InternationalCodeValueType,0,n,"If subjects are listed for this group, it is strongly recommended that the subjects listed also be found in the TopicalCoverage element for the parent packaging element when this group is included directly or by reference in a module containing a coverage element. Use of subject at the group level allows for associating objects as a type of subject based group or to identify subject characteristics of a reusable group of objects.",,,,,,,,,,,ddi:reusable:3_3,e,
 Keyword,InternationalCodeValueType,0,n,"If keywords are listed for this group, it is strongly recommended that the keywords listed also be found in the TopicalCoverage element for the parent packaging element when this group is included directly or by reference in a module containing a coverage element. Use of keyword at the group level allows for associating objects as a type of keyword based group or to identify keyword characteristics of a reusable group of objects.",,,,,,,,,,,ddi:reusable:3_3,e,
-InstrumentReference,Instrument,0,n1,Reference to constituent instrument.,,,,,,,,,,,ddi:datacollection:3_3,e,
+InstrumentReference,Instrument,0,n,Reference to constituent instrument.,,,,,,,,,,,ddi:datacollection:3_3,e,
 InstrumentGroupReference,InstrumentGroup,0,n,Reference to constituent instrument group. This allows for nesting of instrument groups.,,,,,,,,,,,ddi:datacollection:3_3,e,
 IsOrdered,boolean,0,1,"If set to ""true"" indicates that the content of the group is ordered as it appears within the XML structure.",,,,,,,,,,,,a,