Function normalizeAttributeValue

xml/_parser.ts:38–44

* Normalizes attribute value per XML 1.0 §3.3.3. * * Only predefined entities are expanded (lt, gt, amp, apos, quot). * Custom entities from DTD are NOT expanded. * * @see https://www.w3.org/TR/xml/#AVNormalize

(raw: string, xml11: boolean)

 * @see {@link https://www.w3.org/TR/xml/#AVNormalize}
 */
function normalizeAttributeValue(raw: string, xml11: boolean): string {
  // Replace literal \t and \n with space BEFORE entity decoding (preserves 
)
  const normalized = raw.includes("\t") || raw.includes("\n")
    ? raw.replace(/[\t\n]/g, " ")
    : raw;
  return decodeEntities(normalized, xml11);
}

/** Threshold above which duplicate detection switches from linear scan to Set. */
const ATTR_SET_THRESHOLD = 32;