module simple-nodes {
    yang-version 1;
    namespace "urn:opendaylight:"+
        "simple-nodes";
    prefix "sn";

    organization "opendaylight";

    description
        "test file containing yang data nodes";   

    revision "2013-07-30" {
        description
            "Initial revision.";
        reference "will be defined";
    }
    
    typedef mytype {
        type string;
    }

    // NOTE: simple comment

    anyxml data {
        config false;
        description "anyxml desc";
        if-feature has-name;
        mandatory true;
        must "ifType != 'ethernet' or " +
              "(ifType = 'ethernet' and ifMTU = 1500)" {
             error-message "An ethernet MTU must be 1500";
        }
        must "ifType != 'atm' or " +
              "(ifType = 'atm' and ifMTU <= 17966 and ifMTU >= 64)" {
             error-app-tag "anyxml data error-app-tag";
             error-message "An atm MTU must be  64 .. 17966";
             description "an error occured in data";
             reference "data must ref";
        }
        reference "data ref";
        status obsolete;
        when "class != 'wheel'";
    }

    container nodes {
        anyxml text;
        choice level;
        config false;
        container node;
        description "nodes collection";
        grouping node-group {
            leaf source {
                type int8;
            }
            leaf target {
                type int16;
            }
        }
        if-feature has-name;
        leaf nodes-id {
            type int32;
        }
        leaf-list added {
            type mytype;
        }
        list links {
        }
        must "ifType != 'atm' or " +
              "(ifType = 'atm' and ifMTU <= 17966 and ifMTU >= 64)" {
             error-app-tag "anyxml data error-app-tag";
             error-message "An atm MTU must be  64 .. 17966";
             description "an error occured in data";
             reference "data must ref";
        }
        must "ifId != 0";
        presence "required";
        reference "nodes ref";
        status current;
        typedef nodes-type {
            type string;
        }
        uses node-group;
        when "class != 'wheel'";
    }

    list links {
        anyxml text;
        choice level;
        config false;
        container link;
        description "links collection";
        grouping link-group {
            leaf source {
                type int8;
            }
            leaf target {
                type int16;
            }
        }
        if-feature has-name;
        key links-id;
        leaf links-id {
            type int32;
        }
        leaf-list added {
            type int64;
        }
        list nodes {
        }
        max-elements 100;
        min-elements 1;
        must "ifType != 'atm' or " +
              "(ifType = 'atm' and ifMTU <= 17966 and ifMTU >= 64)" {
             error-app-tag "anyxml data error-app-tag";
             error-message "An atm MTU must be  64 .. 17966";
             description "an error occured in data";
             reference "data must ref";
        }
        must "ifId != 0";
        ordered-by user;
        reference "links ref";
        status current;
        typedef nodes-type {
            type string;
        }
        uses link-group;
        when "class != 'wheel'";
    }

}