underlinesee <underline-end>see <underline-start>see @underline-style

<underline> Underline

Underline Attributes parameter entitysee %underline-atts;

%underline-atts;

<underline-end> Underline End

Underline End Attributes

%underline-end-atts;

<underline-start> Underline Start

Underline Start Attributes

%underline-start-atts;

@underline-style

undisclosed authorsee <anonymous>

Uniform Resource Identifieruse <uri>

Uniform Resource Identifier (URI)

unique identifiersee @id

@units Units

units of measuresee <size>use @units

universitysee <aff>see <institution>

university degreeuse <degrees>

University faculty IDsee @contrib-id-type

unknown, authorsee <anonymous>

unordered listsee <list>

unprinted-itemsee <supplementary-material>

unstructured citation textsee <comment>

Unstructured Keyword Group

Unstructured Keyword Group Attributes parameter entitysee %unstructured-kwd-group-atts;

Unstructured Keyword Group Class

Unstructured Keyword Group Elements parameter entitysee %unstructured-kwd-group-elements;

<unstructured-kwd-group>

%unstructured-kwd-group-atts;

%unstructured-kwd-group.class;

%unstructured-kwd-group-elements;

Up/Down Rendition Class Elements parameter entitysee %subsup.class;

<uri>

URI Attributes parameter entitysee %uri-atts;

%uri-atts;

%uri-elements;

URI Elements parameter entitysee %uri-elements;

URI for This Same Article Online

URLsee <ext-link>see <uri>

URL of this articlesee <self-uri>

@use-type use-type

using xml:basesee JATS and Linked Data