EPUB 3 to PEF

Transforms a EPUB 3 publication into a PEF.

Synopsis

Inputs

Input EPUB 3

The EPUB you want to convert to braille.

The EPUB you want to convert to braille.
You may alternatively use the EPUB package document (the OPF-file) if your input is a unzipped/”exploded” version of an EPUB.
Media-type:
- application/epub+zip
- application/oebps-package+xml
Sequence: no
Preamble HTML

An HTML file to be prepended to the EPUB spine.
Media-type:
- application/xhtml+xml
- text/html
Sequence: no

Outputs

Preview

An HTML preview of the braille result.
Media-type:
- text/html
PEF

The intermediary PEF file.
Media-type:
- application/x-pef+xml
OBFL

The intermediary OBFL file.
Media-type:
- text/html
Output file

The output braille file.
Media-type:
- text

Options

Transformer features

Features of the braille transformer.

Features of the braille transformer.
Features of the braille transformer to be used for creating the paginated braille document from the CSS styled input document. Together with the “Braille code” option this determines the transformer that is selected.
Possible values: A query
The syntax is as follows (described in terms of CSS grammar):
```
query
 : feature*
 ;
feature
 : '(' S* IDENT S* [ ':' S* value ]? ')' S*
 ;
value
 : string | integer | IDENT
 ;
```
Default value: (translator:liblouis)(formatter:dotify)
Line spacing
Single or double line spacing.
Single or double line spacing.
Makes the variable $line-spacing available in style sheets and includes the following rule by default:
```
@if $line-spacing == double {
  :root {
    line-height: 2;
  }
}
```
See the CSS specification for more info:
- the line-height property
Possible values: One of the following:

single

Single

double

Double

Default value: single
Duplex

When enabled, will print on both sides of the paper.

Possible values: true or false

Default value: true
Include preview

Whether or not to include a HTML preview of the braille result.

Possible values: true or false

Default value: false
Include PEF

Whether or not to keep the intermediary PEF file (for debugging).

Possible values: true or false

Default value: false
Levels in footer
Specify which headings are rendered in the footer.
Specify which headings are rendered in the footer.
Makes the variable $levels-in-footer available in style sheets and includes the following rule by default:
```
@for $level from 1 through 6 {
  @if $levels-in-footer >= $level {
    h#{$level} {
      string-set: footer content();
    }
  }
}
```
In other words, the footer string is updated each time a heading with a level smaller than or equal to levels-in-footer is encountered. In order to use the footer string include a rule like the following in your custom style sheet:
```
@page {
  @bottom-center {
    content: string(footer);
  }
}
```
See the CSS specification for more info:
- the string-set property
- the @page rule
- the string() function
Possible values: Any <integer>

Default value: 6
Show braille page numbers
When enabled, will number braille pages.
When enabled, will number braille pages.
Makes the variable $show-braille-page-numbers available in style sheets. In order to use the variable include a rule like the following in your custom style sheet:
```
@if $show-braille-page-numbers {
  @page {
    @top-right {
      content: counter(page);
    }
  }
}
```
This will create a page number in the top right corner of every braille page.

See the CSS specification for more info:
- the @page rule
- the counter() function
Possible values: true or false

Default value: true
Page width
The number of columns available for printing.
The number of columns available for printing.
Sets the default page width (this can be overwritten with @page rules), affects media queries that use the ‘width’ feature, and makes the variable $page-width available in style sheets.

See the CSS specification for more info:
- the @page rule
- the size property
- the page dimensions media features
Possible values: Any <integer>

Default value: 40
Maximum number of sheets
The maximum number of sheets in a volume.
The maximum number of sheets in a volume.
Makes the variable $maximum-number-of-sheets available in style sheets and includes the following rule by default:
```
@volume {
  max-length: $maximum-number-of-sheets;
}
```
See the CSS specification for more info:
- the @volume rule
- the max-length property
Possible values: Any <integer>

Default value: 70
Force braille page break
Force braille page breaks at print page breaks.
Force braille page breaks at print page breaks.
Makes the variable $force-braille-page-break available in style sheets and includes the following rule by default:
```
@if $force-braille-page-break {
  .page-front,
  .page-normal,
  .page-special,
  [epub|type='pagebreak'] {
    page-break-before: always;
  }
}
```
See the CSS specification for more info:
- the page-break-before property
Possible values: true or false

Default value: false
Include OBFL

Whether or not the keep the intermediary OBFL file (for debugging).

Possible values: true or false

Default value: false
ASCII braille table for HTML preview

The ASCII braille table used to render the HTML preview.

The ASCII braille table used to render the HTML preview.
If left blank, the locale information in the input document will be used to select a suitable table.
Possible values: A query
The syntax is as follows (described in terms of CSS grammar):
```
query
 : feature*
 ;
feature
 : '(' S* IDENT S* [ ':' S* value ]? ')' S*
 ;
value
 : string | integer | IDENT
 ;
```
Default value:
Include line groups
When disabled, lines in a linegroup are joined together to form one block.
When disabled, lines in a linegroup are joined together to form one block.
Makes the variable $include-line-groups available in style sheets and includes the following rule by default:
```
.linegroup .line {
  display: if($include-line-groups, block, inline);
}
```
Possible values: true or false

Default value: true
Style sheets

A list of XSLT or CSS/Sass style sheets to apply.

A list of XSLT or CSS/Sass style sheets to apply.
Must be a space separated list of URIs, absolute or relative to the input.

Style sheets specified through this option are called “user style sheets”. Style sheets can also be attached to the source document. These are referred to as “author style sheets”. They can be linked (using an ‘xml-stylesheet’ processing instruction or a ‘link’ element), embedded (using a ‘style’ element) and/or inlined (using ‘style’ attributes).

Style sheets are applied to the document in the following way: XSLT style sheets are applied before CSS/Sass style sheets. XSLT style sheets are applied one by one, first the user style sheets, then the author style sheets, in the order in which they are specified.

All CSS/Sass style sheets are applied at once, but the order in which they are specified (first user style sheets, then author style sheets) has an influence on the cascading order.

CSS/Sass style sheets are interpreted according to braille CSS rules.

For info on how to use Sass (Syntactically Awesome StyleSheets) see the Sass manual.

Possible values: Zero or more of the following:

<anyFileURI>

File path relative to input EPUB 3.

<anyURI>

Any other absolute URI

Default value:
Table of contents depth
The depth of the table of contents hierarchy to include. '0' means no table of contents.
The depth of the table of contents hierarchy to include. '0' means no table of contents.
A table of contents will be generated from the heading elements present in the document: from h1 elements if the specified value for “depth” is 1, from h1 and h2 elements if the specified value is 2, etc. The resulting table of contents has the following nested structure:
```
<ol id="generated-document-toc">
  <li>
      <a href="#ch_1" title="Chapter 1">Chapter 1</a>
      <ol>
          <li>
              <a href="#ch_1_1" title="1.1">1.1</a>
              ...
          </li>
          <li>
              <a href="#ch_1_2" title="1.2">1.2</a>
              ...
          </li>
          ...
      </ol>
  </li>
  ...
</ol>
```
Another one of these is generated but with ID generated-volume-toc. ch_1, ch_1_2 etc. are the IDs of the heading elements from which the list was constructed, and the content of the links are exact copies of the content of the heading elements. By default the list is not rendered. The list should be styled and positioned with CSS. The following rules are included by default:
```
#generated-document-toc {
  flow: document-toc;
  display: -obfl-toc;
  -obfl-toc-range: document;
}

#generated-volume-toc {
  flow: volume-toc;
  display: -obfl-toc;
  -obfl-toc-range: volume;
}
```
This means that a document range table of contents is added to the named flow called “document-toc”, and a volume range table of contents is added to the named flow called “volume-toc”. In order to consume these named flows use the function flow(). For example, to position the document range table of contents at the beginning of the first volume, and to repeat the volume range table of content at the beginning of every other volume, include the following additional rules:
```
@volume {
  @begin {
    content: flow(volume-toc, document);
  }
}

@volume:first {
  @begin {
    content: flow(document-toc, document);
  }
}
```
See the CSS specification for more info:
- the display: obfl-toc value
- the flow property
- the flow() function
- the @volume rule
- the @begin rule
Possible values: Any <integer>

Default value: 0
Notes placement
Placement of notes
Placement of notes
Notes, i.e. elements that are referenced by an element with epub:type “noteref”, can be rendered either at bottom of the page on which they occur (on which they are referenced), at the end of the block in which they occur, at the end of the volume in which they occur, or at the end of the book. Elements with epub:type “note”, “footnote”, “endnote” or “rearnote” that are not referenced by a noteref are not rendered.

Note references can be styled using a a[epub|type~='noteref'] rule. Notes that are placed at the end of the block can be styled with a [epub|type~='notes'], [epub|type~='footnotes'], [epub|type~='endnotes'], [epub|type~='rearnotes'] rule. Notes that are placed at the bottom of the page or at the end of a chapter, volume or the end of the book can be styled with a a[epub|type~='noteref']::alternate rule. A title can be inserted at the beginning of an endnotes section using a .endnotes-section::-obfl-on-collection-start rule. Example:
```
.endnotes-section::-obfl-on-collection-start {
   content: "Notes in this volume";
   text-align: center;
   margin-bottom: 1;
}
```
Possible values: One of the following:
bottom-of-page
At the bottom of the page
Notes are rendered in the @footnotes area of the page on which they occur.

There is a built-in fallback mechanism: if a note does not fit on a page, e.g. because it is too big, or there are too many other notes on that page, all notes in the whole book will be rendered at the end of the volume in which they occur.

The footnotes area can be styled using a @footnotes rule. Example:
```
@page {
   @footnotes {
      border-top: ⠤;
      max-height: 20;
   }
}
```
end-of-block

At the end of the block
Notes are rendered after the block (e.g. paragraph) in which they occur.

end-of-chapter

At the end of the chapter
Notes are rendered at the end of the chapter (section) in which they occur.

end-of-volume

At the end of the volume
Notes are rendered in the @end area of the volume in which they occur.

end-of-book
At the end of the book
Notes are rendered in the @end area of the last volume.

Notes can be grouped by volume using a .endnotes-section::-obfl-on-volume-start rule. Example:
```
.endnotes-section::-obfl-on-volume-start {
   content: "Notes in volume " -obfl-evaluate("$started-volume-number");
   margin: 1 0;
}
```
custom

Custom handling
Special handling of notes is disabled. Notes are rendered as specified in custom style sheets.
Default value: end-of-book
Output file format

The file format in which to store the braille result.

The file format in which to store the braille result.
If left blank, the braille will be stored in PEF format.
Possible values: A query
The syntax is as follows (described in terms of CSS grammar):
```
query
 : feature*
 ;
feature
 : '(' S* IDENT S* [ ':' S* value ]? ')' S*
 ;
value
 : string | integer | IDENT
 ;
```
Default value:
Apply document-specific CSS

If this option is enabled, any pre-existing CSS in the EPUB with media "embossed" (or "all") will be used.

If this option is enabled, any pre-existing CSS in the EPUB with media "embossed" (or "all") will be used.
The input EPUB may already contain CSS that applies to embossed media. Such document-specific CSS takes precedence over any CSS attached when running this script.

For instance, if the EPUB already contains the rule p { padding-left: 2; }, and using this script the rule p#docauthor { padding-left: 4; } is provided, then the padding-left property will get the value 2 because that’s what was defined in the EPUB, even though the provided CSS is more specific.

Possible values: true or false

Default value: false
Style sheet parameters

A list of parameters passed to the style sheets.

A list of parameters passed to the style sheets.
Style sheets, whether they’re specified with the “stylesheets” option or associated with the source, may have parameters (variables in case of Sass). The “stylesheet-parameters” option can be used to set these parameters.
Possible values: A query
The syntax is as follows (described in terms of CSS grammar):
```
query
 : feature*
 ;
feature
 : '(' S* IDENT S* [ ':' S* value ]? ')' S*
 ;
value
 : string | integer | IDENT
 ;
```
Default value:
Prefer breaks at higher level sections.

Amount with which preference is given to volume breaks before higher level sections.

Amount with which preference is given to volume breaks before higher level sections.
The value must be greater or equal to 0. It can be a non-integer. A value of 0 means no preference is given. A higher value results in volumes that are less equal in size.

Possible values: Any <string>

Default value: 0
Capital letters
When enabled, will indicate capital letters.
When enabled, will indicate capital letters.
Makes the variable $capital-letters available in style sheets and includes the following rule by default:
```
@if $capital-letters != true {
  :root {
    text-transform: lowercase;
  }
}
```
Possible values: true or false

Default value: true
Page height
The number of rows available for printing.
The number of rows available for printing.
Sets the default page height (this can be overwritten with @page rules), affects media queries that use the ‘height’ feature, and makes the variable $page-height available in style sheets.

See the CSS specification for more info:
- the @page rule
- the size property
- the page dimensions media features
Possible values: Any <integer>

Default value: 25
Allow breaks within sections.

Amount with which volume breaks are allowed within sections.

Amount with which volume breaks are allowed within sections.
The value can range from 1 to 10. The lower the value, the more preference is given to volume breaks right before section elements. The higher the value, the more equal the volumes will be in size.

Possible values: Any <integer>

Default value: 10
Braille code

Braille code to be used for braille transcription.

Braille code to be used for braille transcription.
If set, braille transcription is done with the selected braille code. If left empty, the braille code is determined by the document language and the “Transformer features” option.

Possible values: <liblouis-table-query>

Default value:
Include production notes
When enabled, production notes are included in the content.
When enabled, production notes are included in the content.
Makes the variable $include-production-notes available in style sheets and includes the following rule by default:
```
.prodnote,
[epub|type~='z3998:production'] {
  display: if($include-production-notes, block, none);
}
```
Possible values: true or false

Default value: false
Exclude headings

Class name for excluding headings from the table of contents.

Class name for excluding headings from the table of contents.
If specified, heading elements with this class name are excluded from the generated tables of contents.

Possible values: Any <string>

Default value:
Include images
When enabled, will include the alt text of the images. When disabled, the images will be completely removed.
When enabled, will include the alt text of the images. When disabled, the images will be completely removed.
Makes the variable $include-images available in style sheets and includes the following rule by default:
```
@if $include-images {
  img::after {
    content: attr(alt);
  }
}
```
Possible values: true or false

Default value: true
Hyphenation
When enabled, will automatically hyphenate text.
When enabled, will automatically hyphenate text.
Makes the variable $hyphenation available in style sheets and includes the following rule by default:
```
@if $hyphenation {
  :root {
    hyphens: auto;
  }
}
```
See the CSS specification for more info:
- the hyphens property
Possible values: true or false

Default value: true
Show print page numbers
When enabled, will indicate original page numbers.
When enabled, will indicate original page numbers.
Makes the variable $show-print-page-numbers available in style sheets and includes the following rule by default:
```
@if $show-print-page-numbers {
  .page-front,
  .page-normal,
  .page-special,
  [epub|type='pagebreak'] {
    string-set: print-page attr(title);
  }
}
```
In order to use the print-page string include a rule like the following in your custom style sheet:
```
@page {
  @bottom-right {
    content: string(print-page);
  }
}
```
See the CSS specification for more info:
- the string-set property
- the @page rule
- the string() function
Possible values: true or false

Default value: true
Include captions
When enabled, will include captions for images, tables, and so on.
When enabled, will include captions for images, tables, and so on.
Makes the variable $include-captions available in style sheets and includes the following rule by default:
```
caption {
  display: if($include-captions, block, none);
}
```
Possible values: true or false

Default value: true

Usage: dp2 [GLOBAL_OPTIONS] epub3-to-pef [OPTIONS]

Options:

--epub epub	The EPUB you want to convert to braille.
--preamble preamble	An HTML file to be prepended to the EPUB spine.
--transform [transform]	Transformer features (default: `(translator:liblouis)(formatter:dotify)`)
--line-spacing [line-spacing]	Line spacing (default: `single`)
--duplex [duplex]	Duplex (default: `true`)
--include-preview [include-preview]	Include preview (default: `false`)
--include-pef [include-pef]	Include PEF (default: `false`)
--levels-in-footer [levels-in-footer]	Levels in footer (default: `6`)
--show-braille-page-numbers [show-braille-page-numbers]	Show braille page numbers (default: `true`)
--page-width [page-width]	Page width (default: `40`)
--maximum-number-of-sheets [maximum-number-of-sheets]	Maximum number of sheets (default: `70`)
--force-braille-page-break [force-braille-page-break]	Force braille page break (default: `false`)
--include-obfl [include-obfl]	Include OBFL (default: `false`)
--preview-table [preview-table]	ASCII braille table for HTML preview (default: )
--include-line-groups [include-line-groups]	Include line groups (default: `true`)
--stylesheet [stylesheet]	Style sheets (default: )
--toc-depth [toc-depth]	Table of contents depth (default: `0`)
--notes-placement [notes-placement]	Notes placement (default: `end-of-book`)
--output-file-format [output-file-format]	Output file format (default: )
--apply-document-specific-stylesheets [apply-document-specific-stylesheets]	Apply document-specific CSS (default: `false`)
--stylesheet-parameters [stylesheet-parameters]	Style sheet parameters (default: )
--prefer-volume-break-before-higher-level-factor [prefer-volume-break-before-higher-level-factor]	Prefer breaks at higher level sections. (default: `0`)
--capital-letters [capital-letters]	Capital letters (default: `true`)
--page-height [page-height]	Page height (default: `25`)
--allow-volume-break-inside-leaf-section-factor [allow-volume-break-inside-leaf-section-factor]	Allow breaks within sections. (default: `10`)
--braille-code [braille-code]	Braille code (default: )
--include-production-notes [include-production-notes]	Include production notes (default: `false`)
--toc-exclude-class [toc-exclude-class]	Exclude headings (default: )
--include-images [include-images]	Include images (default: `true`)
--hyphenation [hyphenation]	Hyphenation (default: `true`)
--show-print-page-numbers [show-print-page-numbers]	Show print page numbers (default: `true`)
--include-captions [include-captions]	Include captions (default: `true`)
-o,--output [OUTPUT]	Path where to store the results. This option is mandatory when the job is not executed in the background
-z,--zip	Write the output to a zip file rather than to a folder
-n,--nicename [NICENAME]	Set job's nice name
-r,--priority [PRIORITY]	Set job's priority (high\|medium\|low)
-q,--quiet	Do not print the job's messages
-p,--persistent	Delete the job after it is executed
-b,--background	Sends the job and exits