+# Incremented to format 54, 11 Jan 2014 by gb
+# New InsetLayout tag "FixedWidthPreambleEncoding"
+
+# Incremented to format 55, 20 April 2015 by spitz
+# New InsetLayout and Layout tags "PassThruChars"
+
+# Incremented to format 56, 20 May 2015 by spitz
+# New Float tags "AllowedPlacement", "AllowsWide", "AllowsSideways"
+
+# Incremented to format 57, 30 May 2015 by spitz
+# New Layout tag "ParagraphGroup"
+
+# Incremented to format 58, 5 December 2015, by rgh
+# New Layout tag "ProvideStyle"
+# Change "IfStyle" to "ModifyStyle"
+
+# Incremented to format 59, 22 November 2015 by gm
+# New Tag "OutlinerName"
+# New Layout tags "AddToToc", "IsTocCaption"
+# New Layout argument tag "IsTocCaption"
+
+# Incremented to format 60, 25 March 2016 by lasgouttes
+# Rename caption subtype LongTableNoNumber to Unnumbered
+
+# Incremented to format 61, 14 October 2016 by spitz
+# New Layout tags "ResumeCounter", "StepMasterCounter"
+
+# Incremented to format 62, 21 October 2016 by spitz
+# New Layout argument tag "PassThru"
+
+# Incremented to format 63, 7 January 2017 by spitz
+# - New textclass tags CiteFramework, MaxCiteNames (for cite engines)
+# - Extended InsetCite syntax.
+
+# Incremented to format 64, 30 August 2017 by rgh
+# Strip leading and trailing spaces from LabelString,
+# LabelStringAppendix, and EndLabelString, and LabelCounter,
+# to conform to what we used to do.
+
+# Incremented to format 65, 16 October 2017 by spitz
+# Color collapsable -> collapsible
+
+# Incremented to format 66, 28 December 2017 by spitz
+# New Layout tags "AutoNests ... EndAutoNests" and
+# "IsAutoNestedBy ... EndIsAutoNestedBy"
+
+# Incremented to format 67, 14 April 2018 by spitz
+# New Layout tag "NeedsCProtect"
+
+# Incremented to format 68, 21 May 2018 by spitz
+# New Layout tag "AddToCiteEngine"
+
+# Incremented to format 69, 16 August 2018 by spitz
+# New argument type "listpreamble"
+
+# Incremented to format 70, 5 June 2018 by rkh
+# New InsetLayout tag EditExternal
+
+# Incremented to format 71, 12 March 2019 by spitz
+# New [Inset]Layout tag NeedMBoxProtect
+
+# Incremented to format 72, 26 March 2019 by spitz
+# New TextClass tag TableStyle
+
+# Incremented to format 73, 18 April 2019 by spitz
+# New InsetLayout tag MenuString
+
+# Incremented to format 74, 18 April 2019 by spitz
+# New InsetLayout and Argument tag NewlineCmd
+
+# Incremented to format 75, 2 June 2019 by spitz
+# New Argument tags FreeSpacing, InsertOnNewline
+# New InsetLayout tag ParbreakIgnored
+