# engine/conversion/comparemarkers module ## Functions ### `compareMarkersForDowncast( __namedParameters, __namedParameters ) → number` _(internal)_ Sorts markers so the downcast result is deterministic regardless of the order markers were added to the marker collection. The sort key is the marker's range, ordered "right-to-left" through the document so that a marker's opening boundary is processed _after_ any markers nested inside it. This way the outer marker wraps the inner ones at conversion time. Cases (positions shown as `0123456789`, sort result top-to-bottom): 1. Non-overlapping ranges — sorted by position, last range first: ``` a: [--] → c, b, a b: [--] c: [--] ``` 2. Adjacent ranges (end === start) — treated as non-overlapping: ``` first: [---] → third, second, first second: [---] third: [---] ``` 3. Nested ranges (same start, different ends) — inner first, outer last: ``` shorter: [-] → shorter, longer longer: [---] ``` 4. Partially overlapping ranges — sorted by start position: ``` earlier: [---] → later, earlier later: [---] ``` 5. Identical ranges — fall back to reverse name comparison: ``` alpha: [---] → charlie, bravo, alpha bravo: [---] charlie: [---] ``` [See source](https://github.com/ckeditor/ckeditor5/blob/master/packages/ckeditor5-engine/src/conversion/comparemarkers.ts#L52) #### Parameters * `__namedParameters: readonly [ string, ModelRange ]` * `__namedParameters: readonly [ string, ModelRange ]` #### Returns * `number` --- Full index of the CKEditor 5 API reference: [llms.txt](llms.txt)