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MdfHmdRowType
Lvl Type, Domain name and/or Mnemonic code Concept ID Mnemonic Print Name Definition/Description
1 L:  (assoc) 10072 assoc Association Row Identifies an association leading from the "class" (or association) that is most directly above this row
1 L:  (attr) 10073 attr Attribute Row Identifies an attribute of the "class" (or association) that is most directly above this row.
1 L:  (class) 10071 class HMD root class Identifies "class" in the HMD. There is only one class entry in a Hierarchical Message Definition. This is the root class for the message.
1 L:  (hmd) 10070 hmd HMD identifier Always the first row of the table, identifies the particular Hierarchical Message Definition in the nomenclature of the HL7 Repository.
1 L:  (item) 10074 item Collection Item Row Identifies a message element that represents one of whatever is repeated in a collection
1 L:  (stc) 10075 stc Subtype constraint This row corresponds to a subcomponent of the row above; it would not normally be included in an HMD, but it is included in order to be able to state a constraint on the subtype. This is explained in 10.2.2.4.

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