VR (Value Representation)

Two-letter code describing how a tag's value is encoded (PN, DA, UI, …).

The VR tells you both the syntax of the value and how to interpret it:

• PN — Person Name (Family^Given^Middle^Prefix^Suffix)
• DA — Date (YYYYMMDD)
• TM — Time (HHMMSS[.ffffff])
• UI — Unique Identifier
• CS — Code String (UPPER + digits + underscore)
• LO / SH / LT / ST / UT — Long/Short/Long-Text/Short-Text/Unlimited-Text
• SQ — Sequence (nested dataset)