diff --git a/2020/include/functions.php b/2020/include/functions.php
index d543016..71719f1 100644
--- a/2020/include/functions.php
+++ b/2020/include/functions.php
@@ -1,149 +1,150 @@
 <?php
 # Linux Day Torino website
-# Copyright (C) 2019, 2020 Valerio Bozzolan and contributors
+# Copyright (C) 2019, 2020, 2021 Valerio Bozzolan and contributors
 #
 # This program is free software: you can redistribute it and/or modify
 # it under the terms of the GNU Affero General Public License as published by
 # the Free Software Foundation, either version 3 of the License, or
 # (at your option) any later version.
 #
 # This program is distributed in the hope that it will be useful,
 # but WITHOUT ANY WARRANTY; without even the implied warranty of
 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
 # GNU Affero General Public License for more details.
 #
 # You should have received a copy of the GNU Affero General Public License
 # along with this program. If not, see <http://www.gnu.org/licenses/>.
 
 /**
  * Require a certain page from the template directory
  *
  * @param $name string page name (to be sanitized)
  * @param $args mixed arguments to be passed to the page scope
  */
 function template_2020( $template_name, $template_args = [] ) {
 	extract( $template_args, EXTR_SKIP );
 	return require ABSPATH . "/2020/template/$template_name.php";
 }
 
 /**
  * Spawn a 2020 Event
  *
  * @param int $id Event ID
  */
 function event_2020( $id ) {
 
 	$event = ( new QueryEvent() )
 		->whereEventID( $id )
 		->select( Conference::fields() )
 		->select( Event::fields() )
 		->select( Room::fields() )
 		->select( Track::fields() )
 		->select( Room::fields() )
 		->select( Chapter::fields() )
 		->selectEventHasVideo()
+		->selectEventHasDocument()
 		->joinConference()
 		->joinTrack(   'LEFT' )
 		->joinRoom(    'LEFT' )
 		->joinChapter( 'LEFT' )
 		->queryRow();
 
 	template_2020( 'event-brief', [
 		'event' => $event,
 	] );
 }
 
 /**
  * Print an icon for the 2020 website
  *
  * See https://materializecss.com/icons.html
  *
  * @param string $name Icon name
  * @param string $classes CSS classes
  * @return string
  */
 function icon_2020( $name, $classes = null ) {
 	$classes = $classes ? " $classes" : '';
 	return sprintf(
 		'<i class="material-icons%s">%s</i>',
 		$classes,
 		$name
 	);
 }
 
 /**
  * Query some Event Users
  *
  * @param  Event  $event
  * @param  string $role Choose 'speaker' or 'moderator'
  * @return Generator
  */
 function event_users_2020( $event, $role ) {
 
 	$users =
 	        ( new QueryEventUser() )
 			->joinUser()
 			->whereEvent( $event )
 			->whereEventUserRole( $role )
 			->orderByEventUserOrder()
 			->queryGenerator();
 
 	return $users;
 }
 
 /**
  * Link to an User of the itWikiCon 2020
  *
  * @param User $user
  * @return string HTML firm
  */
 function user_link_2020( $user ) {
 
 	$name = esc_html( $user->getUserDisplayName() );
 
 	// print the Meta-wiki permalink
 	if( $user->has( User::META_WIKI ) ) {
 		$name = HTML::a( $user->getUserMetaWikiURL(), $name );
 	}
 
 	return $name;
 }
 
 /**
  * Print the URL to a Sharable
  *
  * @param  Event    $event
  * @param  Sharable $sharable
  * @param  string   $text
  * @return string HTML
  */
 function sharable_edit( $event, $sharable = null, $text = null ) {
 
 	$s = '';
 
 	// no editable, no party
 	if( $event->isEventEditable() ) {
 
 		// displayed text
 		if( !$text ) {
 			$text = $sharable ? __( "modifica" ) : __( "aggiungi" );
 		}
 
 		// edit or creation URL
 		$url = $sharable
 			? $sharable->getSharableEditURL()
 			: Sharable::editURL( [
 				'event_ID' => $event->getEventID(),
 			] );
 
 		// create link
 		$s = HTML::a( $url, esc_html( $text ) );
 	}
 
 	// [edit]
 	if( $s ) {
 		$s = "[$s]";
 	}
 
 	return $s;
 }
diff --git a/2020/template/event-brief.php b/2020/template/event-brief.php
index 54f6cdb..bed9102 100644
--- a/2020/template/event-brief.php
+++ b/2020/template/event-brief.php
@@ -1,111 +1,133 @@
 <?php
 # itWikiCon website - conference management system based on LinuxDayTorino's website
 # Copyright (C) 2020 Valerio Bozzolan
 #
 # This program is free software: you can redistribute it and/or modify
 # it under the terms of the GNU Affero General Public License as published by
 # the Free Software Foundation, either version 3 of the License, or
 # (at your option) any later version.
 #
 # This program is distributed in the hope that it will be useful,
 # but WITHOUT ANY WARRANTY; without even the implied warranty of
 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 # GNU Affero General Public License for more details.
 #
 # You should have received a copy of the GNU Affero General Public License
 # along with this program.  If not, see <http://www.gnu.org/licenses/>.
 
+/**
+ * Template used to display a single event briefly
+ *
+ * Variables that should be available:
+ *
+ *  $event Event: current Event
+ *     Note that the Event should have these additional attributes:
+ *        event_has_video
+ *        event_has_document
+ */
+
 // query all the Users maintaining this Event
 $users =
 	( new QueryEventUser() )
 		->joinUser()
 		->whereEvent( $event )
 		->whereEventUserIsSpeaker()
 		->orderByEventUserOrder()
 		->queryGenerator();
 ?>
 
 	<div class="event-track-<?= $event->getTrackUID() ?> event-id-<?= $event->getEventID() ?>">
 
 		<?php if( $event->hasEventLanguage() && $event->getEventLanguage() !== 'it' ): ?>
 			<b><?= esc_html( $event->getEventLanguage() ) ?></b>
 		<?php endif ?>
 
 		<p class="flow-text event-brief-title">
 		<?php if( $event->isEventAborted() ): ?>
 			<s><a href="<?= esc_attr( $event->getEventStandardURL() ) ?>"><?= esc_html( $event->getEventTitle() ) ?></a></s>
 			<em><?= __( "sessione annullata" ) ?></em>
 		<?php else: ?>
 			<a href="<?= esc_attr( $event->getEventStandardURL() ) ?>"><?= esc_html( $event->getEventTitle() ) ?></a>
 
 		<?php endif ?>
 		</p>
 
 		<div class="event-hour">
 			<?= $event->getEventStart( 'H:i' ) ?>&ndash;<?= $event->getEventEnd( 'H:i' ) ?>
 		</div>
 
 		<div class="itwikicon-users">
 			<?php foreach( $users as $user ): ?>
 
 				<div class="itwikicon-user">
 				<?php
 
 					// check if the User has an account in Wikimedia Meta-wiki
 					if( $user->has( User::META_WIKI ) ) {
 
 						// print the Meta-wiki permalink
 						echo HTML::a(
 							$user->getUserMetaWikiURL(),
 							esc_html( $user->getUserDisplayName() )
 						);
 
 
 					} else {
 
 						echo esc_html( $user->getUserDisplayName() );
 
 					}
 
 				?>
 				</div>
 
 			<?php endforeach ?>
 		</div>
 
 		<!-- print the view button only if the event is not aborted nor passed -->
 		<?php if( !$event->isEventAborted() && !$event->isEventPassed() ): ?>
 
 			<div class="event-room">
 				<p class="right-align"><?= HTML::a(
 					$event->getRoomURL(),
 					$event->getRoomName().
 					'<i class="material-icons right">play_arrow</i>',
 					null,
 					'btn white blue-text waves-effect'
 				) ?>
 				</p>
 			</div>
 
 		<?php endif ?>
 		<!-- end print the view button only if the event is not aborted nor passed -->
 
 		<!-- start event player -->
 		<?php if( $event->get( 'event_has_video' ) ): ?>
 			<p>
 				<a class="btn blue waves-effect" href="<?= esc_attr( $event->getEventURL() ) ?>">
-					<?= icon_2020( 'play_arrow', 'right' ) ?>
+					<?= icon_2020( 'play_arrow', 'left' ) ?>
 					<?= __( "Rivedi" ) ?>
 				</a>
 			</p>
 		<?php endif ?>
 		<!-- end event player -->
 
+		<!-- start event documents -->
+		<?php if( $event->get( 'event_has_document' ) ): ?>
+			<p>
+				<a class="btn blue waves-effect" href="<?= esc_attr( $event->getEventURL() ) ?>">
+					<?= icon_2020( 'attachment', 'left' ) ?>
+					<?= __( "Materiali" ) ?>
+				</a>
+			</p>
+		<?php endif ?>
+		<!-- end event documents -->
+
 		<?php if( $event->isEventEditable() ): ?>
 			<?= HTML::a(
 				$event->getEventEditURL(),
 				'[edit]'
 			) ?>
 		<?php endif ?>
 
 	</div>
diff --git a/2020/www/event.php b/2020/www/event.php
index b456e2d..68da29c 100644
--- a/2020/www/event.php
+++ b/2020/www/event.php
@@ -1,377 +1,378 @@
 <?php
 # itWikiCon website - conference management system based on LinuxDayTorino's website
 # Copyright (C) 2016, 2017, 2018, 2019, 2020 Valerio Bozzolan, Ludovico Pavesi
 # From Linux Day Torino 2016
 #
 # This program is free software: you can redistribute it and/or modify
 # it under the terms of the GNU Affero General Public License as published by
 # the Free Software Foundation, either version 3 of the License, or
 # (at your option) any later version.
 #
 # This program is distributed in the hope that it will be useful,
 # but WITHOUT ANY WARRANTY; without even the implied warranty of
 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 # GNU Affero General Public License for more details.
 #
 # You should have received a copy of the GNU Affero General Public License
 # along with this program.  If not, see <http://www.gnu.org/licenses/>.
 
 // load all the stuff
 require 'load.php';
 
 // the Event we want to visit
 $event = null;
 
 // load this conference
 //$conference = ( new QueryConference() )
 //	->whereConferenceUID( THIS_CONFERENCE_UID )
 //	->queryRow();
 
 // no conference no party
 //if( !$conference ) {
 //	error_die( sprintf(
 //		"missing conference %s",
 //		THIS_CONFERENCE_UID
 //	) );
 //}
 
 // event UID
 $event_slug = $_SERVER['PATH_INFO'] ?? null;
 if( !$event_slug ) {
 	error_die( "missing event UID" );
 }
 
 // remove unuseful slashes
 $event_slug = trim( $event_slug, _ );
 
 // 123-something
 $event_slug_parts = explode( '-', $event_slug );
 
 // no ID no party
 $event_ID = $event_slug_parts[0] ?? 0;
 $event_ID = (int) $event_ID;
 
 if( $event_ID ) {
 
 	// Event
 	$event = FullEvent::factory()
 		->whereEventID( $event_ID )
 		->queryRow();
 
 } else {
 	// else use the complete Event slug
 
 	// Event
 	$event = FullEvent::factory()
 		->whereEventUID( $event_slug )
 		->queryRow();
 
 }
 
 // no Event no party
 if( !$event ) {
 	error_die( "missing event $event_slug" );
 }
 
 // inherit the Conference information from the Event object
 // the $conference is read from the website header
 $conference = $event;
 
 // check if this is the correct permalink
 if( site_page( $_SERVER['REQUEST_URI'], true ) !== $event->getEventStandardURL( true ) ) {
 	http_redirect( $event->getEventStandardURL( true ) );
 }
 
 // Event speakers
 $speakers   = event_users_2020( $event, 'speaker'    );
 $moderators = event_users_2020( $event, 'moderator' );
 
 // create an array of links
 $links_speaker = [];
 $links_moderator = [];
 foreach( $speakers as $user ) {
 	$links_speaker[]   = user_link_2020( $user );
 }
 foreach( $moderators as $user ) {
 	$links_moderator[] = user_link_2020( $user );
 }
 
 
 // print the website header
 template_2020( 'header', [
 	'conference' => $conference,
 	'title' => $event->getEventTitle(),
 	'url'   => $event->getEventURL(),
 ] );
 ?>
 
 <div class="container">
 	<h1><?= esc_html( $event->getEventTitle() ) ?> &ndash; <?= esc_html( $conference->getConferenceAcronym() ) ?></h1>
 
 	<!-- start speakers -->
 	<?php if( $links_speaker ): ?>
 	<div class="itwikicon-user">
 		<p class="flow-text"><?= __( "di" ) ?> <?= implode( ', ', $links_speaker ) ?></p>
 	</div>
 	<?php endif ?>
 	<!-- end speakers -->
 
 	<!-- start moderator -->
 	<?php if( $links_moderator ): ?>
 	<div class="itwikicon-user">
 		<p><?= __( "Moderatori:" ) ?> <?= implode( ', ', $links_moderator ) ?>.</p>
 	</div>
 	<?php endif ?>
 	<!-- end speaker -->
 
 	<!-- Start files -->
 	<?php $sharables = $event->factorySharebleByEvent()
 		->select( Sharable::fields() )
 		->whereSharableIsRoot()
 		->selectSharableHasChildren()
 		->queryGenerator();
 	?>
 	<?php if( $sharables->valid() ): ?>
 	<div class="section">
 		<div class="row">
 			<?php foreach( $sharables as $sharable ): ?>
 
 				<?php
 					// the sharable may have some children
 					// See https://gitpull.it/T557
 					$child_sharables = [];
 					if( $sharable->get( 'sharable_has_children' ) ) {
 						$child_sharables = ( new QuerySharable() )
 							->whereSharableParent( $sharable )
 							->queryResults();
 					}
 
 					$all_sharables = array_merge( [ $sharable ], $child_sharables );
 				?>
 
 
 			<div class="col s12">
 				<div class="card-panel">
 				<?php if( $sharable->isSharableDownloadable() ): ?>
 
 					<!-- if video -->
 					<?php if( $sharable->isSharableVideo() ): ?>
+
 						<h3><?= __( "Rivedi intervento" ) ?></h3>
 
 						<?php if( $event->isEventPassed() ): ?>
 						<div class="event-hour">
 							<p class="flow-text"><?= __( "Rivedi l'intervento del" ) ?> <?= $event->getEventStart( 'd' ) ?> <?= __( "ottobre" ) ?> <?= __( "delle ore" ) ?> <b><?= $event->getEventStart( 'H:i' ) ?>&ndash;<?= $event->getEventEnd( 'H:i' ) ?></b> in stanza "<?= esc_html( $event->getRoomName() ) ?>":</p>
 						</div>
 						<?php endif ?>
 
 						<video class="responsive-video" controls="controls">
 							<source src="<?= esc_attr( $sharable->getSharablePath() ) ?>" type="<?= esc_attr( $sharable->getSharableMIME() ) ?>" />
 							<?php foreach( $child_sharables as $child_sharable ): ?>
 								<source src="<?= esc_attr( $child_sharable->getSharablePath() ) ?>" type="<?= esc_attr( $child_sharable->getSharableMIME() ) ?>" />
 							<?php endforeach ?>
 						</video>
 
 						<?= sharable_edit( $event, $sharable ) ?>
 
 						<!-- other video formats -->
 						<?php foreach( $all_sharables as $child_sharable ): ?>
 							<p class="flow-text">
 							<?php printf(
 								__("Scarica in formato %s distribuibile sotto licenza %s."),
 								HTML::a(
 									$child_sharable->getSharablePath(),
 									icon_2020('attachment', 'left') .
 									esc_html( $child_sharable->getSharableMIME() ),
 									null,
 									null,
 									'target="_blank"'
 								),
 								$sharable->getSharableLicense()->getLink()
 							) ?>
 							</p>
 
 							<?= sharable_edit( $event, $child_sharable ) ?>
 
 						<?php endforeach ?>
 						<!-- end other video formats -->
 
 					<!-- end if video -->
 					<?php else: ?>
 					<!-- start if not video -->
 
 						<!-- downloadable but not video -->
 						<?php foreach( $all_sharables as $child_sharable ): ?>
 							<p class="flow-text">
 							<?php printf(
 								__("Scarica %s distribuibile sotto licenza %s."),
 								HTML::a(
 									$child_sharable->getSharablePath(),
 									icon_2020('attachment', 'left') .
 									esc_html( $child_sharable->getSharableTitle() ),
 									null,
 									null,
 									'target="_blank"'
 								),
 								$sharable->getSharableLicense()->getLink()
 							) ?>
 							</p>
 
 							<?= sharable_edit( $event, $child_sharable ) ?>
 
 						<?php endforeach ?>
 						<!-- downloadable but not video -->
 
 					<?php endif ?>
 					<!-- end if not video -->
 
 				<?php else: ?>
 					<p class="flow-text">
 						<?php printf(
 							__("Vedi %s distribuibile sotto licenza %s."),
 							HTML::a(
 								$sharable->getSharablePath(),
 								icon_2020('share', 'left') .
 								esc_html( $sharable->getSharableTitle( [ 'prop' => true ] ) ),
 								null,
 								null,
 								'target="_blank"'
 							),
 							$sharable->getSharableLicense()->getLink()
 						) ?>
 					</p>
 
 					<?= sharable_edit( $event, $child_sharable ) ?>
 
 				<?php endif ?>
 
 				</div>
 			</div>
 			<?php endforeach ?>
 		</div>
 	</div>
 	<?php endif ?>
 	<!-- End files -->
 
 	<?= sharable_edit( $event ) ?>
 
 	<?php if( $event->hasEventAbstract() ): ?>
 		<h3><?= __( "Abstract" ) ?></h3>
 		<div class="card-panel">
 			<?= $event->getEventAbstractHTML( [
 				'p' => 'flow-text',
 			] ) ?>
 		</div>
 	<?php endif ?>
 
 	<?php if( !$event->isEventPassed() ): ?>
 	<div class="card-panel">
 		<div class="event-hour">
 			<p class="flow-text"><?= __( "Collegati il" ) ?> <?= $event->getEventStart( 'd' ) ?> <?= __( "ottobre" ) ?> <?= __( "alle" ) ?> <b><?= $event->getEventStart( 'H:i' ) ?>&ndash;<?= $event->getEventEnd( 'H:i' ) ?></b> in <?= esc_html( $event->getRoomName() ) ?>.</p>
 		</div>
 		<p><a class="btn-large waves-effect" href="<?= esc_attr( $event->getRoomURL() ) ?>">
 			<i class="material-icons right">play_arrow</i>
 			<?= esc_html( $event->getRoomName() ) ?>
 		</a></p>
 	</div>
 	<?php endif ?>
 
 	<div class="card-panel">
 
 		<?php if( $event->hasEventDescription() ): ?>
 			<?= $event->getEventDescription() ?>
 
 			<div class="divider"></div>
 		<?php endif ?>
 
 		<p><?= HTML::a(
 			$event->getEventExternalURL(),
 			__( "Maggiori informazioni su Meta-wiki" )
 		) ?></p>
 	</div>
 
         <?php
 	// previous talk in the same Room
         $previouss = $event->factoryPreviousFullEvent( [ 'whatever-room' => true ] )
                 ->select( Event::fields() )
 		->select( Conference::fields() )
                 ->limit( 2 )
                 ->queryResults();
 
 	// next talk in the same room
         $nexts = $event->factoryNextFullEvent( [ 'whatever-room' => true ] )
                 ->select( Event::fields() )
 		->select( Conference::fields() )
                 ->limit( 2 )
                 ->queryResults();
 
 	// in the meanwhile
 	$durings = $event->factoryMeanwhileFullEvent()
 		->limit( 2 )
 		->queryResults();
       ?>
 
         <?php if( $previouss || $nexts || $durings ): ?>
         <!-- Stard previous/before -->
         <div class="divider"></div>
         <div class="section">
                 <div class="row">
                         <div class="col s12 m6">
                                 <?php if( $previouss ): ?>
                                         <h3><i class="material-icons left">navigate_before</i><?= __("Preceduto da") ?></h3>
 					<?php foreach( $previouss as $previous ): ?>
                                         <p class="flow-text">
                                                 <?= HTML::a(
                                                         $previous->getEventURL(),
                                                         esc_html( $previous->getEventTitle() )
                                                 ) ?>
                                                 <time datetime="<?= $previous->getEventStart('Y-m-d H:i') ?>"><?= $previous->getEventHumanStart() ?></time>
                                         </p>
 					<?php endforeach ?>
                                 <?php endif ?>
                         </div>
                         <div class="col s12 m6 right-align">
                                 <?php if( $nexts ): ?>
                                         <h3><?= __("A seguire") ?><i class="material-icons right">navigate_next</i></h3>
 					<?php foreach( $nexts as $next ): ?>
                                         <p class="flow-text">
                                                 <?= HTML::a(
                                                         $next->getEventURL(),
                                                         esc_html( $next->getEventTitle() )
                                                 ) ?>
                                                 <time datetime="<?= $next->getEventStart('Y-m-d H:i') ?>"><?= $next->getEventHumanStart() ?></time>
                                         </p>
 					<?php endforeach ?>
                                 <?php endif ?>
                         </div>
                         <div class="col s12">
                                 <?php if( $durings ): ?>
                                         <h3><?= __("Nello stesso momento") ?><i class="material-icons">play_arrow</i></h3>
 					<?php foreach( $durings as $during ): ?>
                                         <p class="flow-text">
                                                 <?= HTML::a(
                                                         $during->getEventURL(),
                                                         esc_html( $during->getEventTitle() )
                                                 ) ?>
                                                 <time datetime="<?= $during->getEventStart('Y-m-d H:i') ?>"><?= $during->getEventHumanStart() ?></time>
                                         </p>
 					<?php endforeach ?>
                                 <?php endif ?>
                         </div>
                 </div>
         </div>
         <!-- End previous/before -->
         <?php endif ?>
 
 	<?php if( $event->isEventEditable() ): ?>
 		<p><?= HTML::a(
 			$event->getEventEditURL(),
 			'[edit]'
 		) ?></p>
 	<?php endif ?>
 </div>
 
 <?php
 // print the website header
 template_2020( 'footer', [
 	'conference' => $conference,
 ] );