View source for Template:DDC

<includeonly>{{#switch: {{{1|}}} 
 |000|100|200|300|400|500|600|700|800|900 = [[Category:Dewey/{{{1}}}|{{{2|{{BASEPAGENAME}}}}}]]
 |#default = [[Category:Dewey/Uncategorized|{{BASEPAGENAME}}]]
}}
<div {{#if:{{{style|}}}|style="{{{style}}}"}}>
{{#if:{{{show|}}}|{{#if:{{{1|}}}|
:[[WB:DDC|Dewey Decimal]] Category: [[:Category:Dewey/{{{1}}}|{{{2|{{{1}}}}}}]]}}}}</div></includeonly><noinclude>

This template adds books to the major Dewey Decimal category</noinclude>