+\end_inset
+
+ and
+\begin_inset Flex Code
+status collapsed
+
+\begin_layout Plain Layout
+
+\backslash
+end{btUnit}
+\end_layout
+
+\end_inset
+
+ as \SpecialChar TeX
+ code (for instance to work around the mentioned limitation).
+ Note, though, that
+\begin_inset Flex Code
+status collapsed
+
+\begin_layout Plain Layout
+btUnit
+\end_layout
+
+\end_inset
+
+s cannot be nested.
+ A second limitation is that
+\begin_inset Flex Code
+status collapsed
+
+\begin_layout Plain Layout
+bibtopic
+\end_layout
+
+\end_inset
+
+ always processes all references of a bibliography database, even if they
+ are not cited.
+ This can result in odd labels (e.
+\begin_inset space \thinspace{}
+\end_inset
+
+g.
+
+\begin_inset Quotes eld
+\end_inset
+
+Miller 2014b
+\begin_inset Quotes erd
+\end_inset
+
+ if two works of this author from 2014 are in the database, even if only
+ one is cited).
+\end_layout
+
+\begin_layout Standard
+If you use
+\family sans
+Biblatex
+\family default
+, the
+\begin_inset Flex Code
+status collapsed
+
+\begin_layout Plain Layout
+refsection
+\end_layout
+
+\end_inset
+
+ option is used instead.
+ If you need specific units, you can start them with the \SpecialChar TeX
+ code
+\begin_inset Flex Code
+status collapsed
+
+\begin_layout Plain Layout
+
+\backslash
+newrefsection
+\end_layout
+
+\end_inset
+
+ or
+\begin_inset Flex Code
+status collapsed
+
+\begin_layout Plain Layout
+
+\backslash
+newrefsegment
+\end_layout
+
+\end_inset
+
+, respectively.
+ If you also want to control the end of the unit, use the environment
+\begin_inset Flex Code
+status collapsed
+
+\begin_layout Plain Layout
+
+\backslash
+begin{refsection}
+\end_layout
+
+\end_inset
+
+ \SpecialChar ldots
+
+\begin_inset Flex Code
+status collapsed
+
+\begin_layout Plain Layout
+
+\backslash
+end{refsection}
+\end_layout
+
+\end_inset
+
+ instead.
+ Note, though, that
+\begin_inset Flex Code
+status collapsed
+
+\begin_layout Plain Layout
+refsection
+\end_layout
+
+\end_inset
+
+s cannot be nested.
+ In addition to the individual bibliography of the current unit,
+\family sans
+Biblatex
+\family default
+ also provides an easy way to output all bibliographies, subsequently, at
+ one place (e.
+\begin_inset space \thinspace{}
+\end_inset
+
+g., at the end of the document).
+ Select
+\begin_inset Quotes eld
+\end_inset
+
+all reference units
+\begin_inset Quotes erd
+\end_inset
+
+ from the Content combo box of the Bib(la)TeX inset dialog in order to achieve
+ this.
+ Please refer to the
+\family sans
+Biblatex
+\family default
+ manual for more information on this topic.
+\end_layout
+
+\begin_layout Section
+Multipart Documents
+\end_layout
+
+\begin_layout Subsection
+General Operation
+\end_layout
+
+\begin_layout Standard
+When you are working on a large file with many sections, it is often convenient
+ to break up the document into several files, or perhaps you have something
+ where a table may change from time to time, but the preceding text does
+ not.
+ In these cases, you should seriously consider using multipart documents.
+ For example, scientific papers often have five major sections: the introduction
+, observations, results, discussion, and conclusion.
+ Each of these could be its own separate \SpecialChar LyX
+ file, with one
+\begin_inset Quotes eld
+\end_inset
+
+master
+\begin_inset Quotes erd
+\end_inset
+
+ file which contains the title, authors, abstract, references, etc., plus
+ the five included files.
+ It is important to note that each of these files is a full \SpecialChar LyX
+ file which
+ can be formatted and printed on its own, as well as included in a master
+ file.
+ Each of these files must have the same document class, however—don't attempt
+ to mix book classes with article classes.
+ You may also include \SpecialChar LaTeX
+ files; however, these files must not have their own
+ preamble (i.
+\begin_inset space \thinspace{}
+\end_inset
+
+e.
+\begin_inset space \space{}
+\end_inset
+
+everything up to and including the
+\begin_inset Flex Code
+status collapsed
+
+\begin_layout Plain Layout
+
+\backslash
+begin{document}
+\end_layout
+
+\end_inset
+
+ line as well as the
+\begin_inset Flex Code
+status collapsed
+
+\begin_layout Plain Layout
+
+\backslash
+end{document}
+\end_layout
+
+\end_inset
+
+ line must be deleted) or else errors will be generated when you try to
+ make a DVI file.
+\end_layout
+
+\begin_layout Standard
+\SpecialChar LyX
+ allows you to include files quite easily with
+\begin_inset Flex Noun
+status collapsed
+
+\begin_layout Plain Layout
+Insert\SpecialChar menuseparator
+Child
+\begin_inset space ~
+\end_inset
+
+Document
+\end_layout
+
+\end_inset
+
+.
+ When you click on this selection a small box is inserted into the file
+ at the current cursor location.
+ Clicking on the box raises a dialog which allows you to select the file
+ to be included, and the method of its inclusion.
+
+\end_layout
+
+\begin_layout Standard
+The file selection box should by now be obvious.
+ The three inclusion methods are
+\begin_inset Quotes eld
+\end_inset
+
+include
+\begin_inset Quotes erd
+\end_inset
+
+,
+\begin_inset Quotes eld
+\end_inset
+
+input
+\begin_inset Quotes erd
+\end_inset
+
+, and
+\begin_inset Quotes eld
+\end_inset
+
+verbatim
+\begin_inset Quotes erd
+\end_inset
+
+.
+ The methods
+\begin_inset Quotes eld
+\end_inset
+
+include
+\begin_inset Quotes erd
+\end_inset
+
+ and
+\begin_inset Quotes eld
+\end_inset
+
+input
+\begin_inset Quotes erd
+\end_inset
+
+ are similar in many ways, but there are also some notable differences:
+\end_layout
+
+\begin_layout Enumerate
+Files that are
+\begin_inset Quotes eld
+\end_inset
+
+included
+\begin_inset Quotes erd
+\end_inset
+
+ are typeset beginning on a new page, while files that are
+\begin_inset Quotes eld
+\end_inset
+
+inputted
+\begin_inset Quotes erd
+\end_inset
+
+ are typeset starting on the current page.
+\end_layout
+
+\begin_layout Enumerate
+\begin_inset Quotes eld
+\end_inset
+
+Included
+\begin_inset Quotes erd
+\end_inset
+
+ files cannot themselves
+\begin_inset Quotes eld
+\end_inset
+
+include
+\begin_inset Quotes erd
+\end_inset
+
+ further files (
+\begin_inset Quotes eld
+\end_inset
+
+grandchilds
+\begin_inset Quotes erd
+\end_inset
+
+).
+ With
+\begin_inset Quotes eld