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<sect1 id="sect-dataentryextern">
<title>Obtaining Data from External Sources</title>
<para>
Data are commonly obtained from external sources such as from
other files, either in a spreadsheet format or in delimited text
format, from other applications using the mouse to copy and paste
data or from external applications such as databases or internet
data streams.
</para>
<sect2 id="sect-dataentryextern-files">
<title>Obtaining Data from External Files</title>
<para>
Data which already exist in an external file can be imported
into a workbook first by opening the file into a separate
instance of &gnum; and then by
copying the relevant data into the desired worksheet.
</para>
<para>
Data contained in external files in the formats of several other
spreadsheet applications can be opened by
&gnum;.
&gnum; can open files in
<application>Applix</application> (TM) format, GNU
<application>Oleo</application> format, Lotus
<application>123</application> (TM) format, Microsoft
<application>Excel</application> (TM) format,
<application>Multiplan</application> (TM) format, OpenOffice
<application>Calc</application> or StarOffice
<application>Calc</application> (TM) format, <application>Plan
Perfect</application> (TM) format, <application>Quattro
Pro</application> (TM) format, <application>sc</application> and
<application>XSpread</application> format or in the
<application>Xbase</application> format.
</para>
<para>
Data contained in external text files which are formatted in
well defined ways can also be opened by
&gnum;.
&gnum; can open files formatted in
Data Interchange Format, formatted as HTML tables, or formatted
in text formats such as comma separated values or tab delimited
records. The opening of text format files is configurable by the
user so that text files which contain data formatted in a wide
variety of schemes can be imported correctly into
&gnum;. Obtaining data from these
files is explained in detail in the section titled <xref
linkend="sect-file-open" />.
</para>
<para>
Data which are opened into a separate instance of
&gnum; can be copied and pasted
into the current worksheet with the copy and paste commands as
explained in <xref linkend="sect-movecopy-cutandpaste" />.
</para>
</sect2>
<sect2 id="sect-dataentryextern-cutnpaste">
<title>Obtaining Data by Cut and Paste</title>
<para>
Data can be obtained from other
&gnum; workbooks or other
applications using the mouse to copy data and paste them into a
worksheet. This is explained below in the section titled <xref
linkend="sect-movecopy-xclipboard" />.
</para>
</sect2>
<sect2 id="sect-datasource-database">
<title>Getting Data from a Database</title>
<para>
This has not yet been written.
</para>
</sect2>
<sect2 id="sect-datasource-stream">
<title>Getting Data from an Internet Data Stream</title>
<para>
&gnum; has been connected to
external data sources such as stock quotation service data
streams using an experimental plugin. This requires the ability
to write programming code. Information on extending
&gnum; by developing plugins can be
found in the section called <xref
linkend="sect-extending-plugins"/> and the actual computer
source code can be found in the directory
<literal>gnumeric/plugins/sample_datasource/</literal> of
either a distribution of &gnum; or
in a code checkout from the revision control
repository.
</para>
</sect2>
</sect1>
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