@calendar indicates the system or calendar to which the date represented by the content of this element belongs, but this element has no textual content. The element should not be categorized in detail with @subtype unless also categorized in general with @type @targetLang can only be used if @target is specified. The element indicated by @spanTo () must follow the current element Only one of the attributes @target and @cRef may be supplied on . Only one of the attributes @target' and @cRef' may be supplied on If the @target attribute on is used, the relatedItem element must be empty A relatedItem element should have either a 'target' attribute or a child element to indicate the related bibliographic item An lg element must contain at least one child l, lg or gap element. You may not nest one s element within another: use seg instead WARNING: use of deprecated attribute — @type of the biblScope element will be removed from the TEI on 2014-12-17.