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Holdings Statements: Levels of Holdings Statements
Level 3 provides a summary statement of holdings which is always compressed at the highest level possible. If enumeration and/or chronology are applicable, only the highest levels (first-order designators) are included.
Level 4 provides a detailed statement of holdings. If enumeration and/or chronology are applicable, the most specific levels (including all hierarchical levels) must be included.statement includes the most
specific levels of enumeration (first-order and subsequent-order designators). The holdings statement may be compressed to the first-order designator.
Note: At level 3 and level 4, compressed serial holdings may appear to be identical. However, a level 4 compressed holdings statement indicates that there are no gaps in the library's holdings -- while a level 3 holdings statement does not carry the same guarantee of completeness of holdings.