studyElem 0004 1420 "0" // Offset of referenced lower-level dir entity : to be computed later
studyElem 0004 1430 "STUDY " // Directory Record Type don't remove trailing space !
studyElem 0008 0005 "ISO_IR 100" // Specific Character Set
-studyElem 0008 0020 "" // Study Date
-studyElem 0008 0030 "" // Study Time
-studyElem 0008 0050 "" // Accession Number
+studyElem 0008 0020 "UNKNOWN" // Study Date // Type 1C Conditional Element
+studyElem 0008 0030 "UNKNOWN" // Study Time // Type 1C Conditional Element
+studyElem 0008 0050 "UNKNOWN" // Accession Number // Type 1C Conditional Element
studyElem 0008 1030 "" // Study Description
studyElem 0020 000d "" // Study Instance UID : may be forged later
studyElem 0020 0010 "" // Study ID : may be forged later