大家在用织梦做二次开发的时候，可能会用到栏目信息表arctype里的其他字段，比如dedecms5.7标签调用栏目seotitle

就是{dede:channel type='son,top,self'}[field:seotitle/]{/dede:channel}这样的调用方法：

打开/include/taglib文件夹，第48行至64行中有:

if($type=='top')    {        $sql = "Select id,typename,typedir,isdefault,ispart,               defaultname,namerule2,moresite,siteurl,sitepath               From `80php_arctype` where reid=0 And ishidden<>1                order by sortrank asc limit 0, $line ";    }    else if($type=='son')    {        if($typeid==0) return '';        $sql = "Select id,typename,seotitle,typedir,isdefault,ispart,                 defaultname,namerule2,moresite,siteurl,sitepath                 From `80php_arctype` where reid='$typeid' And                  ishidden<>1 order by sortrank asc limit 0, $line ";    }    else if($type=='self')    {        if($reid==0) return '';        $sql = "Select id,typename,typedir,isdefault,ispart,                defaultname,namerule2,moresite,siteurl,sitepath                From `80php_arctype` where reid='$reid' And                 ishidden<>1 order by sortrank asc limit 0, $line ";    }

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