/ *: [namespace-uri()=' '] [ ] / @ @*[local-name()=' ' and namespace-uri()=' '] / [ ] /@ / [ ] /@ . U U U. n U. _ _ @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. (string-length(.) gt 0) The element should not be categorized in detail with @subtype unless also categorized in general with @type (@type) @targetLang can only be used if @target is specified. (count(@target)) The element indicated by @spanTo must follow the current element (following::*[@xml:id=substring(current()/@target,2)]) @spanTo on must point to the identifier of some element in this document (id(substring(@spanTo,2))) Only one of the attributes @target and @cRef may be supplied on . (@target and @cRef) Only one of the attributes @target' and @cRef' may be supplied on (@target and @cRef) If the @target attribute on is used, the relatedItem element must be empty (@target and count( child::* ) > 0) A relatedItem element should have either a 'target' attribute or a child element to indicate the related bibliographic item (@target or child::*) An lg element must contain at least one child l, lg or gap element. (count(descendant::tei:lg|descendant::tei:l|descendant::tei:gap) > 0) On , either the @marks attribute should be used, or a paragraph of description provided (not(@marks) and not (tei:p)) You may not supply both @target and @targets on (@target and @targets) You must supply either @target or @targets on (not(@target) and not(@targets)) You must supply at least two values for @target on (contains(@target,' ')) You may not supply both @target and @targets on (@target and @targets) You must supply either @target or @targets on (not(@target) and not(@targets)) You must supply at least two values for @target on (contains(@target,' ')) You may not supply both @target and @targets on (@target and @targets) You must supply either @target or @targets on (not(@target) and not(@targets))