Description
Count caller-supplied Unicode Script_Extensions labels without embedding or inferring a Unicode database.
Text positions can be measured in UTF-16 code units, Unicode code points, grapheme clusters, or modeled display columns. These coordinates are not interchangeable. Invisible markers and delimiter policies can also affect interpretation even when a string looks unchanged, so the chosen representation needs to stay explicit.
Count caller-supplied Unicode Script_Extensions labels without embedding or inferring a Unicode database.
When to use this tool
Use Unicode Script Extensions Cardinality when you need the stated marker, coordinate, delimiter, or normalization operation under an explicit text representation.
How to use the tool and how it works
- Enter suppliedScripts, unknown. Use the units and conventions below.
- Run the tool. Correct any format, range, or cross-field input error before interpreting the output.
- Read uniqueScripts, cardinality, known. Inspect known before interpreting the associated values.
Deduplicate suppliedScripts in first-occurrence order, require every retained token nonempty, and return cardinality and known=!unknown.1
| Input field | Meaning and units | Accepted input |
|---|---|---|
| suppliedScripts | Supplied Scripts | Required. Array of text; maximum UTF-16 length 8192; maximum items 256. |
| unknown | Unknown | Required. Boolean. |
| Output field | Interpretation | Returned shape |
|---|---|---|
| uniqueScripts | Unique Scripts | Required. Array of text; maximum UTF-16 length 8192; maximum items 256. |
| cardinality | Cardinality | Required. Safe integer. |
| known | Inverse of the supplied unknown flag, not a verified registry result. | Required. Boolean. |
{
"input": {
"suppliedScripts": [
"Hira",
"Kana",
"Hira"
],
"unknown": false
},
"output": {
"uniqueScripts": [
"Hira",
"Kana"
],
"cardinality": 2,
"known": true
}
}Limitations and assumptions
- Known is a supplied uncertainty flag, not evidence from a Unicode lookup. Scripts can still be returned when known is false; no script registry or text context 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
Choose the coordinate system required by the consumer. Use a full parser, renderer, or segmentation method when a local marker or delimiter rule cannot determine the complete text behavior.
References
Similar or alternative tools
- Unicode Script Transition Count
Count transitions in supplied Unicode script annotations after explicit ignored-label removal; does not infer scripts from text.
- Text: Bidi Control Visible Name Label
Name one of the twelve Unicode Bidi_Control code points for visible inspection, without applying the bidirectional layout algorithm.