Content model for the <conference> element
<!ENTITY % conference-model
"(conf-date, (conf-name | conf-acronym )+,
conf-num?, conf-loc?, conf-sponsor*,
conf-theme?)" >(conf-date, (conf-name | conf-acronym )+, conf-num?, conf-loc?, conf-sponsor*, conf-theme?)
articleauthcustom-models3.ent