Used to mark text that should appear with a horizontal line beneath it for display or print
This is normally a print consideration — not a matter for XML tagging — as underlining is frequently prohibited in online works, since it is a common “this is a link” signal.
<!ELEMENT underline (#PCDATA %emphasized-text;)* >
Any combination of:
<abbrev> Abbreviation or Acronym; <abbrev-journal-title> Abbreviated Journal Title; <addr-line> Address Line; <aff> Affiliation; <alt-title> Alternate Title; <article-title> Article Title; <attrib> Attribution; <bold> Bold; <chem-struct> Chemical Structure (Display); <citation> Citation; <collab> Collaborative (Group) Author; <comment> Comment in a Citation; <conf-acronym> Conference Acronym; <conf-loc> Conference Location; <conf-name> Conference Name; <conf-num> Conference Number; <conf-sponsor> Conference Sponsor; <conf-theme> Conference Theme; <contract-num> Contract/Grant Number; <contract-sponsor> Contract/Grant Sponsor; <copyright-statement> Copyright Statement; <corresp> Correspondence Information; <def-head> Definition List: Definition Head; <degrees> Degree(s); <disp-formula> Formula, Display; <edition> Edition, Cited; <email> Email Address; <etal> Et Al.; <ext-link> External Link; <fax> Fax Number: in an Address; <font> Font; <given-names> Given (First) Names; <gov> Government Report, Cited; <history> History: Document History; <inline-formula> Formula, Inline; <inline-supplementary-material> Inline Supplementary Material; <institution> Institution Name: in an Address; <issue> Issue Number; <issue-title> Issue Title; <italic> Italic; <journal-subtitle> Journal Subtitle (Full); <journal-title> Journal Title (Full); <kwd> Keyword; <label> Label (of a Figure, Reference, Etc.); <meta-name> Metadata Data Name for Custom Metadata; <meta-value> Metadata Data Value for Custom Metadata; <monospace> Monospace Text (Typewriter Text); <named-content> Named Special (Subject) Content; <on-behalf-of> On Behalf of; <overline> Overline; <p> Paragraph; <patent> Patent Number, Cited; <phone> Phone Number: in an Address; <prefix> Prefix; <preformat> Preformatted Text; <product> Product Information; <publisher-loc> Publisher’s Location; <publisher-name> Publisher’s Name; <related-article> Related Article Information; <role> Role or Function Title of Contributor; <sc> Small Caps; <self-uri> URI for This Same Article Online; <series> Series; <series-text> Series Text: Header Text to Describe; <series-title> Series Title; <source> Source; <speaker> Speaker; <std> Standard, Cited; <strike> Strike Through; <string-date> Date as a String; <string-name> Name of Person (Unstructured); <sub> Subscript; <subject> Subject Grouping Name; <subtitle> Article Subtitle; <suffix> Suffix; <sup> Superscript; <supplement> Supplement Information; <surname> Surname; <target> Target of an Internal Link; <td> Table Data Cell (XHTML table model); <term> Definition List: Term; <term-head> Definition List: Term Head; <th> Table Header Cell (XHTML table model); <title> Title; <trans-source> Translated Source; <trans-subtitle> Translated Subtitle; <trans-title> Translated Title; <underline> Underline; <uri> Uniform Resource Indicator (URI); <verse-line> Line of a Verse; <volume> Volume Number; <volume-id> Volume Identifier; <xref> X(cross) Reference
... <p>... Oligonucleotide primers for the amplification of TbH4 included 5′-ATTAGGT<italic>CAT</italic><underline><italic>ATG</italic> </underline><bold>CACCATCACCATCACCAT</bold>ACGCAGTCGCAGACCGTGACGG and 3′-TATAGG<italic>AAGCTT</italic>CTAATCCTCGGTGTAGAGCGCCTCG. XP-1 was amplified with 5′-CAATTA<italic>CAT</italic><underline> <italic>ATG</italic></underline><bold>CATCACCATCACCATCAC</bold> AACGACGGCGAAGGAACTGTGC and 3′-AACCTG<italic>GAATTC</italic>GTCCATGCTCACTTCGAC, and the 38-kDa antigen was amplified with 5′-CAATTA<italic>CAT</italic> <underline><italic>ATG</italic></underline><bold>CATCACCATCACCATCAC</bold> TGTGGCTCGAAACCACCGAGC and ...</p> ...
format.ent