Hi everybody,

Can you please explain what data-toggle means in this markup

<button class="btn" ng-click="loadAceEditorFile(currentLayout)" ng-hide="currentLayout.layoutTypes.isFrx" 
                                data-toggle="tooltip"
                                title="@Messages.loadlocalfile">
                            <i class="fa fa-file fa-2x"></i>
                        </button>
                        <button class="btn" ng-click="saveAceEditorFile(currentLayout, editorLayout)" ng-hide="currentLayout.layoutTypes.isFrx" 
                                data-toggle="tooltip"
                                title="@Messages.saveToLocalFile">
                            <i class="fa fa-save fa-2x"></i>
                        </button>

There is no tooltip mentioned anywhere else in the page. What does this line for the button mean?

Thanks in advance.