====== 997 Editing Status ======
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^Mandatory ^Repeatable ^Editable |
|no|may occur only once per ownership description|yes|

===== Scope =====
Indicates the reliability of the information given on a specific piece of evidence and the type of source from which it has been gained.

===== Indicators =====
  * Indicator 1: **|** undefined (fill-character)
  * Indicator 2: **|** undefined (fill-character)

===== Subfields =====
  * **$6** (M;NR) Evidence Sequence Number
  * **$a** (M;NR) Level of certainty
  * **$b** (M;NR) Type of source


===== Input Conventions =====
The evidence sequence number in **$6** groups all chunks of information that describe the evidence for a specific ownership. All fields with an identical subfield $6 within a record describe the same ownership.


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**$a** is a coded subfield with exact one code position:
|a|The recording of this piece of evidence is considered certain.|
|b|The recording of this piece of evidence is considered uncertain.|
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**$b** is a coded subfield with up to 6 code positions. The code positions are filled from left to right, any unused code position is left empty.
|a|Book in Hand|
|b|Bibliography|
|c|Library Catalogue|
|e|Auction/Sales Catalogue|
|f|Hist. Library Catalogue / Accession Journal|
|x|unknown/other|