View source for Template:Period span/brief

<includeonly>{{#iferror:{{#expr: {{{2|0}}} }}
|{{Period span/aux
 |period={{{1|}}}
 |period2={{{2|}}}
 |start={{Period start|{{{1|}}}|{{#iferror:{{#expr: 1+{{{3}}} }}|0|{{{3}}}}}}}
 |end={{Period start|{{Next period|{{{2|}}}}}|{{#iferror:{{#expr: 1+{{{3}}} }}|0|{{{3}}}}}}} 
 }}
|{{Period span/aux
 |period={{{1|}}}
 |period2={{{1|}}}
 |start={{Period start|{{{1|}}}|{{#iferror:{{#expr: 1+{{{2}}} }}|0|{{{2}}}}}}}
 |end={{Period start|{{Next period|{{{1|}}}}}|{{#iferror:{{#expr: 1+{{{2}}} }}|0|{{{2}}}}}}} 
 }}
}}</includeonly><noinclude>{{documentation}}</noinclude>