Description
Return a word-alignment pair and null-partner flag.
Language-processing records depend on tokenization, indexing, null sentinels and text representation. A UTF-8 byte offset, UTF-16 index, dependency link or literal feature label can be handled precisely without inferring linguistic correctness or semantic equivalence.
Return a word-alignment pair and null-partner flag.
When to use this tool
Use Word Alignment Null Partner Flag when checking a supplied linguistic annotation, span, alignment or text-offset convention.
How to use the tool and how it works
- Enter sourceIndex, targetIndex, nullTargetIndex. Use the units and conventions below.
- Run the tool. Correct any format, range, or cross-field input error before interpreting the output.
- Read nullAligned, alignment. Inspect nullAligned before interpreting the associated values.
Return a word-alignment pair and null-partner flag. Require whole sourceIndex >= 0 and target/nullTargetIndex >= -1; nullAligned compares the target with the supplied null sentinel, alignment serializes both indexes as JSON.1
| Input field | Meaning and units | Accepted input |
|---|---|---|
| sourceIndex | Source Index | Required. Safe integer; minimum 0. |
| targetIndex | Target Index | Required. Safe integer; minimum -1. |
| nullTargetIndex | Null Target Index | Required. Safe integer; minimum -1. |
| Output field | Interpretation | Returned shape |
|---|---|---|
| nullAligned | Null Aligned | Required. Boolean. |
| alignment | Alignment | Required. Text; maximum UTF-16 length 8192. |
{
"input": {
"sourceIndex": 2,
"targetIndex": -1,
"nullTargetIndex": -1
},
"output": {
"nullAligned": true,
"alignment": "[2,-1]"
}
}Limitations and assumptions
- The null convention and token indexes are supplied; no sentence, alignment quality or index upper bound is verified.
- Inputs must satisfy both the field types and the cross-field conditions above. Invalid input causes an error; a successful false flag or documented placeholder is a different result.
- Numeric calculations use binary floating point unless exact decimal-integer arithmetic is explicitly stated. No hidden measurement tolerance or decimal rounding is added; nonfinite or out-of-contract results are rejected. Numeric signed-zero results are exported as zero.
Alternative or Complementary methods
Use the appropriate tokenizer, Unicode and annotation-format conventions and validate the complete text or tree for full linguistic processing.
References
Similar or alternative tools
- Word Alignment Fertility Count
Count distinct nonnull targets aligned to one source token.
- Alignment Null Support Share
Summarize alignment weight at supplied null indexes.