Editing Rebol (section)

===Dialects===
Rebol [[domain-specific language]]s, called ''dialects'', are micro-languages optimized for a specific purpose. Dialects can be used to define business rules, graphical user interfaces or sequences of screens during the installation of a program. Users can define their own dialects, reusing any existing Rebol word and giving it a specific meaning in that dialect.<ref name="RD" /> Dialects are [[interpreted language|interpreted]] by functions processing Rebol blocks (or parsing strings) in a specific way.

An example of Rebol's dialecting abilities can be seen with the word <code>''return''</code>. In the ''data exchange dialect'' <code>''return''</code> is just a word not having any specific meaning. In the ''do dialect'', <code>''return''</code> is a [[global variable]] referring to a native [[Function (computer science)|function]] passing back a function result value.<ref name="OG">Goldman, E., Blanton, J. (2000). ''REBOL: The Official Guide.'' McGraw-Hill Osborne Media. {{ISBN|0-07-212279-X}}.</ref> In the ''visual interface dialect (VID)'', <code>''return''</code> is a [[Keyword (computer programming)|keyword]] causing the layout engine to simulate a [[carriage return]], moving the "rendering pen" down to the beginning of the next line.<ref name="RP" />

A Rebol interpreter with graphical abilities must understand and interpret many dialects. The table below lists the most important ones in order of significance.
{| class="wikitable"
|-
! Dialect name
! Interpreted by
! Purpose
|-
| Data exchange dialect
| <code>load</code> function
| represents data and metadata; common platform for Rebol dialects
|-
| Do dialect
| <code>do</code> function
| programming
|-
| Parse dialect
| <code>parse</code> function
| [[pattern matching]]
|-
| Function specification dialect
| <code>make</code> function
| [[function (computer science)|function]] definition; [[functional programming]]
|-
| Object specification dialect
| <code>make</code> function
| [[object (computer science)|object]] definition/inheritance; [[prototype-based programming]]
|-
| Visual interface dialect (VID)<br>or<br>RebGUI
| <code>layout</code> function<br>or<br><code>display</code> function
| specifies [[graphical user interface]]
|-
| Draw dialect
| <code>view</code> function
| defines graphical elements (lines, polygons, etc.)
|-
| Script specification dialect
| <code>do</code> function
| script definition
|-
| Security policy dialect
| <code>secure</code> function
| specifies security policy
|}