Profile
Strict
Balanced
Lenient
Checks
25 active
Trailing whitespace
Terminal punctuation (ISBD)
Blank indicator normalization
Subfield delimiter spacing
245 $a article/case
ISBN-10 → ISBN-13 flag
Duplicate field detection
Leader/008 presence
040 $b language
RDA/AACR2 detection
Required subfields
008 date/language
LDR encoding level
035 OCLC format
Subject heading source
245 ind2 nonfiling
Fixed-field coherence
RDA 33X checks
260/264 policy
Identifier validation
Language consistency
Authority hygiene
Extended subject source
880/$6 linkage
76X-78X $w checks
Input — MARC Breaker format
Normalized output
Normalized record
Change diff
// Output will appear here after normalization.
// Diff will appear here after normalization.