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Added

  • XLSX password-to-open encryption and decryption using Office Agile encryption. Issue [#3878] PR [#4975] PR [#4988]
  • Support for Excel sparklines (line, column, and win/loss) in Xlsx reader and writer. Issue [#4941]
  • Read-only object model for Pivot Tables. Existing pivot tables in an Xlsx file are now parsed into Worksheet\PivotTable\PivotTable objects (name, location, source cache definition, and row/column/page/data field layout), accessible via Worksheet::getPivotTableCollection() / getPivotTableByName(). Pivot tables (their tables, caches and records) are now also preserved through an Xlsx load/save round-trip instead of being silently dropped. Issue [#4534]

Changed

  • Performance: avoid Worksheet::getStyle() on every Cell::setValueExplicit() unless quote-prefix must change. On a dense 40k-cell populate+save microbenchmark this cut wall time by ~5%. PR [#4958]
  • Infrastructure changes for documentation. PR [#4973]

Fixed

  • Security patches.
  • Xls Writer now creates conformant CFB/DIFAT metadata at FAT-sector boundaries. Issue [#4811] PR [#4983]
  • Ods Reader/Writer Drawings. Issue [#4809] PR [#4956]
  • Ods Writer no longer converts cell references or commas inside string literals, so ="THIS IS E1" is written unchanged instead of as ="THIS IS [.E1]". Issue [#4454] PR [#4962]
  • Ods Reader/Writer slight improvement for Date styles. PR [#4960]
  • BETAINV/BETA.INV no longer abandons its search when the Beta CDF underflows to zero (wrong results for alpha above about 1080). PR [#4954]
  • GAMMA.INV, the GAMMA.DIST/CHISQ.DIST/F.DIST densities, and GAMMALN no longer fail or return wrong results for large shape parameters / degrees of freedom. PR [#4953]
  • GAMMAINV/GAMMA.INV no longer clamps upper-tail quantiles beyond alphabeta5. PR [#4946]
  • Correct incomplete gamma convergence for GAMMA.DIST/CHISQ.DIST family (wrong once the series argument reached ~32). PR [#4945]
  • Fix problem with VLOOKUP and whole-column ranges. Issue [#4969] PR [#4967]
  • Problem with Xlsx Writer and header-row table. PR [#4968]
  • Throw when Ods Reader encounters invalid Xml. PR [#4986]
  • Update Sheetname in Charts when Sheetname changes. Issue [#744] PR [#4984]
Source: README.md, updated 2026-09-17