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Review material on updating layout files to the development docs.
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@ -201,6 +201,32 @@ name "sec:When-is-an"
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When you are working on a new feature you may ask yourself whether it needs
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an update of the .lyx file format number.
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Whether an update is needed or not is not always obvious.
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\end_layout
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\begin_layout Description
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Rule
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\begin_inset space ~
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\end_inset
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of
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\begin_inset space ~
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\end_inset
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thumb:
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\end_layout
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\begin_deeper
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\begin_layout Standard
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Whenever there is the danger that a previous version of LyX cannot open
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a file using the new feature, a file format update is needed.
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\end_layout
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\begin_layout Standard
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The file format change allows lyx2lyx rules to implement backwards compatibility.
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\end_layout
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\end_deeper
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\begin_layout Standard
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Below you can find a list of reasons for file format updates with explanations:
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\end_layout
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@ -215,28 +241,6 @@ document
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setting Whenever you introduce a new setting that is stored in the document
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header, a file format update is needed.
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This is also true if you add a new valid value to an existing setting,
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e.
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\begin_inset space \thinspace{}
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\end_inset
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g.
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\begin_inset space \space{}
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\end_inset
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a new language that is stored in
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\begin_inset Flex Code
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status collapsed
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\begin_layout Plain Layout
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\backslash
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language
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\end_layout
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\end_inset
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.
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\end_layout
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\begin_layout Description
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@ -257,7 +261,64 @@ New
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\begin_inset space ~
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\end_inset
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inset Of course a new inset requires a file format update.
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valid
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\begin_inset space ~
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\end_inset
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value
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\begin_inset space ~
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\end_inset
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for
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\begin_inset space ~
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\end_inset
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an
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\begin_inset space ~
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\end_inset
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existing
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\begin_inset space ~
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\end_inset
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setting, e.
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\begin_inset space \thinspace{}
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\end_inset
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g.
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\end_layout
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\begin_deeper
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\begin_layout Description
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\paragraph_spacing single
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Automatically
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\begin_inset space ~
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\end_inset
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loaded
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\begin_inset space ~
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\end_inset
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math
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\begin_inset space ~
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\end_inset
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package The reason for this is that there is no true ERT inset for math
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formulas: Each command is parsed, and if a user happens to define a local
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command with the same name as a command that triggers an automatic load
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of a package, they need to be able to switch off the automatic loading
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of that package.
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This switch is stored by the
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\begin_inset Flex Code
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status collapsed
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\begin_layout Plain Layout
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use_package
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\end_layout
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\end_inset
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header setting.
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\end_layout
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\begin_layout Description
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@ -265,6 +326,72 @@ New
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\begin_inset space ~
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\end_inset
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language that is stored in
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\begin_inset Flex Code
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status collapsed
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\begin_layout Plain Layout
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\backslash
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language
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\end_layout
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\end_inset
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.
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\begin_inset Foot
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status open
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\begin_layout Plain Layout
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TODO: Discuss if this is really required or whether new languages can be
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treated similar to new layouts (cf.
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\begin_inset CommandInset ref
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LatexCommand ref
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reference "subsec:New-layouts"
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\end_inset
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).
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\end_layout
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\end_inset
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\end_layout
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\end_deeper
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\begin_layout Description
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New
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\begin_inset space ~
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\end_inset
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inset Of course a new inset requires a file format update.
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\end_layout
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\begin_layout Description
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Modified
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\begin_inset space ~
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\end_inset
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layouts
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\begin_inset space ~
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\end_inset
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and
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\begin_inset space ~
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\end_inset
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modules with a
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\end_layout
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\begin_deeper
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\begin_layout Description
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new
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\begin_inset space ~
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\end_inset
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style If a new style or inset layout is added to any layout file or module
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shipped with \SpecialChar LyX
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, then a new file format is needed in the master (development)
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@ -282,47 +409,45 @@ reference "subsec:Backporting-new-styles"
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\end_layout
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\begin_layout Description
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Removed
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removed
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\begin_inset space ~
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\end_inset
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style If a style or inset layout is removed in any layout file or module
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shipped with \SpecialChar LyX
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, then a new file format is required.
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, a new file format is required.
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\end_layout
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\begin_layout Description
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Automatically
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\begin_inset space ~
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\end_inset
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loaded
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\begin_inset space ~
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\end_inset
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math
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\begin_inset space ~
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\end_inset
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package Any new math package that is automatically loaded needs a file format
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update.
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The reason for this is that there is no true ERT inset for math formulas:
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Each command is parsed, and if a user happens to define a local command
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with the same name as a command that triggers an automatic load of a package,
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they need to be able to switch off the automatic loading of that package.
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This switch is stored by the
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\begin_inset Flex Code
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\begin_layout Standard
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However,
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\series bold
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new
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\series default
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layouts and modules do
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\series bold
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not
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\series default
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require a file format update.
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\begin_inset Foot
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status collapsed
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\begin_layout Plain Layout
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use_package
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Changed 03/16, see
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\begin_inset CommandInset ref
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LatexCommand ref
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reference "subsec:New-layouts"
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\end_inset
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for the rationale.
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\end_layout
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\end_inset
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header setting.
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\end_layout
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\end_deeper
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\begin_layout Standard
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If you are still unsure, please ask on the development list.
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\end_layout
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@ -1039,10 +1164,6 @@ Note: This section is currently only a proposal under discussion.
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Remove this note once a consensus is found.
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\end_layout
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\begin_layout Plain Layout
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Summary of a recent discussion in lyx-devel by GM.
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\end_layout
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\begin_layout Plain Layout
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See the thread
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\begin_inset Quotes eld
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@ -1106,7 +1227,6 @@ target "https://wiki.lyx.org/Layouts/Layouts"
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In older versions of this document, it was stated that new layout files
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require a file format change.
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After some discussion it was decided that this is not needed.
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For reference, here are the arguments on each side:
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\begin_inset Foot
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status open
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@ -1114,7 +1234,7 @@ status open
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See
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\begin_inset CommandInset href
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LatexCommand href
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name "this thread"
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name "the thread “Proposal for a guide on updating layouts”"
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target "http://permalink.gmane.org/gmane.editors.lyx.devel/161202"
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\end_inset
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@ -1127,6 +1247,11 @@ target "http://permalink.gmane.org/gmane.editors.lyx.devel/161202"
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\end_layout
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\begin_layout Quote
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For reference, here are the arguments on each side
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\end_layout
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\begin_deeper
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\begin_layout Description
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Pro
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\begin_inset Quotes eld
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@ -1140,8 +1265,15 @@ New layout files are a file format change
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\end_layout
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\begin_layout Itemize
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All documents produced by 2.2.x can always be edited and exported even if
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x is different.
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All documents produced by 2.2.
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\begin_inset Formula $x$
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\end_inset
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can always be edited and exported even if
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\begin_inset Formula $x$
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\end_inset
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is different.
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This is important for people using different machines, or exchanging work
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with colleagues.
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\end_layout
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@ -1173,15 +1305,10 @@ We have the same situation already with custom layout files: If a document
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\end_layout
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\begin_layout Itemize
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The lyx2lyx script cannot do anything useful on backward conversion in such
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a case, and the forward conversion would be a no-op.
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\end_layout
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\begin_layout Standard
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As said, consensus has been reached that the reasons in favor of not requiring
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a file format change are more compelling.
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The lyx2lyx script cannot do anything useful in such a case.
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\end_layout
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\end_deeper
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\begin_layout Standard
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If you have decided that you are going to add a new layout file to \SpecialChar LyX
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itself,
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@ -1201,7 +1328,7 @@ lib/layouts/
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and add it to Git (
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\begin_inset Flex Code
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status open
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status collapsed
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\begin_layout Plain Layout
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git add lib/layouts/newlayout.layout
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@ -1246,13 +1373,11 @@ Found: [InsetInfo]
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\end_layout
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\begin_layout Standard
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\paragraph_spacing single
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where [InsetInfo] is obtained by entering in the minibuffer (Alt+X)
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\begin_inset Flex Code
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status collapsed
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\begin_layout Plain Layout
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\paragraph_spacing single
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info-insert textclass <name>
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\end_layout
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@ -1280,7 +1405,9 @@ no
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\end_deeper
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\begin_layout Enumerate
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Add a template or example file to
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A template or example is strongly encouraged (but not necessarily required).
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It is also possible to provide both.
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Add them to
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\begin_inset Flex Code
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status collapsed
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@ -1452,10 +1579,9 @@ This point was also made here: http://permalink.gmane.org/gmane.editors.lyx.deve
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\end_layout
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\begin_layout Standard
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Moreover, because the layout file is completely new, it can be added both
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to the master and the stable branches, in accord with the policy discussed
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in
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\begin_layout Itemize
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The new layout can be added both to the master and the stable branches,
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in accord with the policy discussed in
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\begin_inset CommandInset ref
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LatexCommand formatted
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reference "subsec:New-layouts"
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@ -1467,8 +1593,8 @@ reference "subsec:New-layouts"
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\end_layout
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\begin_layout Standard
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The user can then move an existing document to the new version simply by
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selecting a new document class.
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The user can move an existing document to the new version simply by selecting
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a new document class.
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This step is well supported by \SpecialChar LyX
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, with established methods for handling
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unsupported styles and other changes.
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@ -1508,7 +1634,7 @@ status collapsed
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file as an optional argument in the
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\begin_inset Flex Code
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status open
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status collapsed
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\begin_layout Plain Layout
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@ -1542,8 +1668,8 @@ DeclareLaTeXClass[acmsiggraph]{ACM SIGGGRAPH (v.
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\end_layout
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\begin_layout Itemize
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Update the GUI name in the old layout file (whose name should not have been
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changed), e.g.:
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Update the GUI name in the old layout file (whose name should not be changed),
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e.g.:
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\begin_inset Newline newline
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\end_inset
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@ -1581,9 +1707,9 @@ Input
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remove\SpecialChar breakableslash
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obsolete\SpecialChar breakableslash
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modify settings and styles (similar
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to inclusion of
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to the inclusion of
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\begin_inset Flex Code
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status open
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status collapsed
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\begin_layout Plain Layout
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*.inc
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