Description
Return valid for exactly five ASCII digits and leadingZero when token starts with zero.
Identifier validation can involve several distinct questions: whether text has the expected shape, whether a checksum is consistent, and whether an authority actually assigned the identifier. Formatting and field extraction address narrower questions. Each result must be read according to the particular property the tool checks.
Return valid for exactly five ASCII digits and leadingZero when token starts with zero.
When to use this tool
Use Isrc Recording Number Fixed Width Check when you need the particular shape, formatting, field, or checksum property as one explicit stage in an identifier workflow.
How to use the tool and how it works
- Enter token. Use the units and conventions below.
- Run the tool. Correct any format, range, or cross-field input error before interpreting the output.
- Read valid, leadingZero. Inspect valid, leadingZero before interpreting the associated values.
Return valid for exactly five ASCII digits and leadingZero when token starts with zero.1
| Input field | Meaning and units | Accepted input |
|---|---|---|
| token | Token | Required. Text; maximum UTF-16 length 8192. |
| Output field | Interpretation | Returned shape |
|---|---|---|
| valid | Whether this tool’s particular check passes; does not imply broader identifier or protocol validity. | Required. Boolean. |
| leadingZero | Leading Zero | Required. Boolean. |
{
"input": {
"token": "00123"
},
"output": {
"valid": true,
"leadingZero": true
}
}Limitations and assumptions
- LeadingZero is reported independently and can be true for a malformed token. This is one recording-number field check without full ISRC validation, year interpretation, or registry verification.
- The field tables state structural bounds; the mechanics also specify cross-field constraints. Malformed inputs and unsupported domains cause errors. A successful false flag, empty branch value, or zero placeholder has the meaning stated above and is distinct from an input error.
Alternative or Complementary methods
Use a complete format and checksum validator when required, then consult the issuing registry or verification process for assignment and identity. Preserve meaningful leading zeros as text.
References
Similar or alternative tools
- GS1 AI Fixed Field Leading Zero Preserver
Preserve a supplied field verbatim while checking numeric fixed width and counting its leading zeros.
- GS1 AI Fixed Length Padding Check
Check a digit field's supplied fixed length and report any missing character count without padding it.