Description
Map one ISSN-style digit or uppercase X check symbol to its numeric value.
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.
Map one ISSN-style digit or uppercase X check symbol to its numeric value.
When to use this tool
Use ISSN X To Ten Value 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 symbol. Use the units and conventions below.
- Run the tool. Correct any format, range, or cross-field input error before interpreting the output.
- Read value. Use the output convention below.
Require one digit or uppercase X. Return its numeric value, using 10 for X.1
| Input field | Meaning and units | Accepted input |
|---|---|---|
| symbol | Symbol | Required. Text; maximum UTF-16 length 8192. |
| Output field | Interpretation | Returned shape |
|---|---|---|
| value | Value | Required. Safe integer. |
{
"input": {
"symbol": "X"
},
"output": {
"value": 10
}
}Limitations and assumptions
- This interprets a supplied ISSN check symbol without deriving or verifying it. Lowercase x is rejected and no ISSN shape, registry record, or serial identity is checked.
- 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
- ISSN Numeric To X Check Symbol
Convert a supplied modulo-11 remainder into an ISSN-style check digit or X.
- Ark Qualifier Leading Separator Check
Return valid when qualifier is empty or starts with slash or dot.