diff --git a/cl-theme/static/css/style.css b/cl-theme/static/css/style.css
index 889ef99..f9da1f6 100644
--- a/cl-theme/static/css/style.css
+++ b/cl-theme/static/css/style.css
@@ -578,6 +578,13 @@ h4 > a:hover {
     }
 }
 
+/* hidden text more */
+.hidden-more {
+    overflow: hidden;
+    white-space: nowrap;
+    text-overflow: ellipsis;
+}
+
 /* aplaylist */
 .play-menu {
     height: 200px;
diff --git a/cl-theme/templates/article.html b/cl-theme/templates/article.html
index 92c91ba..9636ebc 100644
--- a/cl-theme/templates/article.html
+++ b/cl-theme/templates/article.html
@@ -68,12 +68,12 @@
         <!-- start of posts -->
         <div class="columns is-multiline is-centered">
             <!-- start of post -->
-            <article class="column is-10">
+            <article class="column is-10" itemscope itemtype="https://schema.org/CreativeWork">
                 <div class="card">
 
                     <!-- post header -->
                     <div class="card-content-header">
-                        <h2 class="title is-4 has-text-centered" id="titulo">{{ article.title }}</h2>
+                        <h2 class="title is-4 has-text-centered" id="titulo" itemprop="name">{{ article.title }}</h2>
                     </div>
                     <!-- end of post header -->
 
@@ -82,7 +82,7 @@
                         <div class="content">
                             <div class="card-inner-wrapper">
                                 <!-- post text -->
-                                <div class="card-content-text has-text-justified">
+                                <div class="card-content-text has-text-justified" itemprop="text">
                                     {% if article.toc %}
                                         <nav class="toc">
                                             {{ article.toc }}
diff --git a/cl-theme/templates/article_info.html b/cl-theme/templates/article_info.html
index 16e5d2f..02e1e83 100644
--- a/cl-theme/templates/article_info.html
+++ b/cl-theme/templates/article_info.html
@@ -3,7 +3,26 @@
     <div class="column has-text-left">
         <a class="button is-small is-button-grey" href="{{ SITEURL }}/">{{ _('Regresar al Inicio') }}</a>
     </div>
-    <div class="column has-text-right">
+
+    {% if article.modified %}
+        <div class="column has-text-centered">
+            <p>
+                <span class="soumaicon">
+                    <svg>
+                        <use href="{{ SITEURL }}/{{ THEME_STATIC_DIR }}/images/icons/master.svg#calendar"></use>
+                    </svg>
+                </span>
+                <span class="edit-link" title="{{ _('Fecha de modificación') }}">
+                    <small class="screen-reader-text">{{ _('Modificado el') }} </small>
+                    <time class="updated" datetime="{{ article.modified.isoformat() }}" itemprop="dateModified">
+                        <small>{{ article.locale_modified }}</small>
+                    </time>
+                </span>
+            </p>
+        </div>
+    {% endif %}
+
+    <div class="column has-text-right hidden-more">
         <span class="soumaicon">
             <svg>
                 <use href="{{ SITEURL }}/{{ THEME_STATIC_DIR }}/images/icons/master.svg#calendar" />
@@ -12,7 +31,7 @@
         {% set año = article.date|strftime('%Y') %}
         {% set mes = article.date|strftime('%m') %}
         {% set nombre_mes = article.date|strftime('%B') %}
-        <time class="entry-date published"
+        <time class="entry-date published" itemprop="datePublished"
               datetime="{{ article.date.isoformat() }}">
             <small>
                 {{ article.date|strftime('%a %-d') }}
@@ -33,10 +52,12 @@
                 </svg>
             </span>
             {% for author in article.authors %}
-                <small>
-                    <a href="{{ SITEURL }}/{{ author.url }}"
-                       title="{% trans %}Autor del artículo{% endtrans %}">{{ author }}</a>{% if not loop.last %}, {% endif %}
-                </small>
+                <span itemprop='author' itemscope itemtype="https://schema.org/Person" >
+                    <small itemprop="name">
+                        <a href="{{ SITEURL }}/{{ author.url }}" itemprop="url"
+                           title="{% trans %}Autor del artículo{% endtrans %}">{{ author }}</a>{% if not loop.last %}, {% endif %}
+                    </small>
+                </span>
             {% endfor %}
         {% endif %}
 
diff --git a/cl-theme/templates/base.html b/cl-theme/templates/base.html
index 5749808..e2ae996 100644
--- a/cl-theme/templates/base.html
+++ b/cl-theme/templates/base.html
@@ -1,6 +1,6 @@
 <!DOCTYPE html>
 <html lang="{% block html_lang %}{{ DEFAULT_LANG }}{% endblock %}">
-    <head prefix="og: http://ogp.me/ns# {% if article %}article: http://ogp.me/ns/article#{% endif%}">
+    <head prefix="og: https://ogp.me/ns#{% if article %} article: https://ogp.me/ns/article#{% endif%}">
         {% set SITESUBTITLE = _('Sitio de información sobre Software Libre') %}
         {% block head %}
 
@@ -56,7 +56,7 @@
     </head>
     <body>
         <!-- navigation -->
-        <header class="navigation">
+        <header class="navigation" itemscope itemtype="https://schema.org/WPHeader">
             <nav class="navbar">
                 <div class="container">
                     <!-- nav site title -->
@@ -82,12 +82,12 @@
                     {% if DISPLAY_PAGES_ON_MENU %}
                         <div id="navMenu" class="navbar-menu">
                             <ul class="navbar-end">
-                                <li><a href="{{ SITEURL }}/" class="navbar-item is-tab {% if output_file == 'index.html' %} is-active{% endif %}">{{ _('Inicio') }}</a></li>
+                                <li><a itemprop="url" href="{{ SITEURL }}/" class="navbar-item is-tab {% if output_file == 'index.html' %} is-active{% endif %}">{{ _('Inicio') }}</a></li>
                                 {% for p in pages %}
-                                    <li><a href="{{ SITEURL }}/{{ p.url }}" class="navbar-item is-tab {% if p == page %} is-active{% endif %}">{{ p.title }}</a></li>
+                                    <li><a itemprop="url" href="{{ SITEURL }}/{{ p.url }}" class="navbar-item is-tab {% if p == page %} is-active{% endif %}">{{ p.title }}</a></li>
                                 {% endfor %}
-                                <li><a href="{{ SITEURL }}/{{ ARCHIVES_URL }}" class="navbar-item is-tab {% if output_file == ARCHIVES_SAVE_AS %} is-active {% endif %}">{{ _('Archivos') }}</a></li>
-                                <li><a href="{{ SITEURL }}/{{ AUTHORS_URL }}" class="navbar-item is-tab {% if output_file == AUTHORS_SAVE_AS %} is-active{% endif %}">{{ _('Créditos') }}</a></li>
+                                <li><a itemprop="url" href="{{ SITEURL }}/{{ ARCHIVES_URL }}" class="navbar-item is-tab {% if output_file == ARCHIVES_SAVE_AS %} is-active {% endif %}">{{ _('Archivos') }}</a></li>
+                                <li><a itemprop="url" href="{{ SITEURL }}/{{ AUTHORS_URL }}" class="navbar-item is-tab {% if output_file == AUTHORS_SAVE_AS %} is-active{% endif %}">{{ _('Créditos') }}</a></li>
                             </ul>
                         </div>
                     {% endif %}
@@ -102,10 +102,10 @@
             <section class="hero">
                 <div class="hero-body">
                     <div class="container">
-                        <div class="has-text-centered">
+                        <div class="has-text-centered" itemscope itemtype="https://schema.org/Blog">
                             {%- block sitename -%}
                                 <!-- header && subheader -->
-                                <h1 class="title is-1 is-spaced">{{ SITENAME }}</h1>
+                                <h1 class="title is-1 is-spaced" itemprop="name">{{ SITENAME }}</h1>
                                 <p class="subtitle is-4">{{ SITESUBTITLE }}</p>
                             {%- endblock -%}
 
@@ -141,14 +141,14 @@
                     <div class="columns is-multiline is-centered has-text-centered">
                         <!-- start of post -->
                         {% for article in articles_page.object_list %}
-                            <article class="column is-4">
+                            <article class="column is-4" itemscope itemtype="https://schema.org/CreativeWork">
                                 <div class="card">
                                     <!-- image for post -->
                                     {% if article.image %}
                                         <div class="card-image">
                                             <a href="{{ SITEURL }}/{{ article.url }}#titulo">
                                                 <figure class="image ihover circle3">
-                                                    <img src="{{ SITEURL }}/{{ THEME_STATIC_DIR }}/../wp-content/uploads/article/poster/{{ article.image }}" alt="{{ article.title }}">
+                                                    <img src="{{ SITEURL }}/{{ THEME_STATIC_DIR }}/../wp-content/uploads/article/poster/{{ article.image }}" alt="{{ article.title }}" itemprop="image">
                                                 </figure>
                                             </a>
                                         </div>
@@ -156,7 +156,7 @@
                                         <div class="card-image">
                                             <a href="{{ SITEURL }}/{{ article.url }}#titulo">
                                                 <figure class="image ihover circle3">
-                                                    <img src="{{ SITEURL }}/{{ THEME_STATIC_DIR }}/images/background/745x372.png" alt="Image">
+                                                    <img src="{{ SITEURL }}/{{ THEME_STATIC_DIR }}/images/background/745x372.png" alt="Image" itemprop="image">
                                                 </figure>
                                             </a>
                                         </div>
@@ -165,7 +165,7 @@
 
                                     <!-- post header -->
                                     <div class="card-content-header">
-                                        <h4 class="title is-4"><a href="{{ SITEURL }}/{{ article.url }}#titulo" rel="bookmark" title="{{ _('Enlace a %(articulo)s', articulo=article.title|striptags) }}">{{ article.title }}</a></h4>
+                                        <h4 class="title is-4" itemprop="headline"><a href="{{ SITEURL }}/{{ article.url }}#titulo" rel="bookmark" title="{{ _('Enlace a %(articulo)s', articulo=article.title|striptags) }}">{{ article.title }}</a></h4>
                                     </div>
                                     <!-- end of post header -->
 
@@ -220,11 +220,11 @@
         <!-- end of page content -->
         <!-- .site-content -->
 
-        <footer class="footer footer-top-shadow">
+        <footer class="footer footer-top-shadow" itemscope itemtype="https://schema.org/WPFooter">
 
             <!-- header nav content -->
-            <div class="navbar is-social-center">
-                <a class="navbar-item" href="{{ SOCIAL['diaspora'] }}">
+            <div class="navbar is-social-center" itemscope itemtype="https://schema.org/FollowAction">
+                <a class="navbar-item" href="{{ SOCIAL['diaspora'] }}" itemprop="followee">
                     <span class="soumaicon">
                         <svg>
                             <use href="{{ SITEURL }}/{{ THEME_STATIC_DIR }}/images/icons/master.svg#diaspora"/>
@@ -232,7 +232,7 @@
                         </svg>
                     </span>
                 </a>
-                <a class="navbar-item" href="{{ SOCIAL['gnusocial'] }}">
+                <a class="navbar-item" href="{{ SOCIAL['gnusocial'] }}" itemprop="followee">
                     <span class="soumaicon">
                         <svg>
                             <use href="{{ SITEURL }}/{{ THEME_STATIC_DIR }}/images/icons/master.svg#gnusocial"/>
@@ -240,7 +240,7 @@
                         </svg>
                     </span>
                 </a>
-                <a class="navbar-item" href="{{ SOCIAL['pump'] }}">
+                <a class="navbar-item" href="{{ SOCIAL['pump'] }}" itemprop="followee">
                     <span class="soumaicon">
                         <svg>
                             <use href="{{ SITEURL }}/{{ THEME_STATIC_DIR }}/images/icons/master.svg#pump"/>
@@ -248,7 +248,7 @@
                         </svg>
                     </span>
                 </a>
-                <a class="navbar-item" href="{{ SOCIAL['pixelfed'] }}">
+                <a class="navbar-item" href="{{ SOCIAL['pixelfed'] }}" itemprop="followee">
                     <span class="soumaicon">
                         <svg>
                             <use href="{{ SITEURL }}/{{ THEME_STATIC_DIR }}/images/icons/master.svg#pixelfed"/>
@@ -256,7 +256,7 @@
                         </svg>
                     </span>
                 </a>
-                <a class="navbar-item" href="{{ SOCIAL['peertube'] }}">
+                <a class="navbar-item" href="{{ SOCIAL['peertube'] }}" itemprop="followee">
                     <span class="soumaicon">
                         <svg>
                             <use href="{{ SITEURL }}/{{ THEME_STATIC_DIR }}/images/icons/master.svg#peertube"/>
@@ -264,7 +264,7 @@
                         </svg>
                     </span>
                 </a>
-                <a class="navbar-item" href="{{ SOCIAL['mediagoblin'] }}">
+                <a class="navbar-item" href="{{ SOCIAL['mediagoblin'] }}" itemprop="followee">
                     <span class="soumaicon">
                         <svg>
                             <use href="{{ SITEURL }}/{{ THEME_STATIC_DIR }}/images/icons/master.svg#mediagoblin"/>
@@ -272,7 +272,7 @@
                         </svg>
                     </span>
                 </a>
-                <a class="navbar-item" href="{{ SOCIAL['matrix'] }}">
+                <a class="navbar-item" href="{{ SOCIAL['matrix'] }}" itemprop="followee">
                     <span class="soumaicon">
                         <svg>
                             <use href="{{ SITEURL }}/{{ THEME_STATIC_DIR }}/images/icons/master.svg#matrix"/>
@@ -281,7 +281,7 @@
                     </span>
                 </a>
                 {% if FEED_ALL_ATOM %}
-                    <a class="navbar-item" href="{{ FEED_DOMAIN }}/{{ FEED_ALL_ATOM }}" rel="alternate" type="application/atom+xml">
+                    <a class="navbar-item" href="{{ FEED_DOMAIN }}/{{ FEED_ALL_ATOM }}" rel="alternate" type="application/atom+xml" itemprop="url">
                         <span class="soumaicon">
                             <svg>
                                 <use href="{{ SITEURL }}/{{ THEME_STATIC_DIR }}/images/icons/master.svg#rss"/>
@@ -298,8 +298,8 @@
                         <use href="{{ SITEURL }}/{{ THEME_STATIC_DIR }}/images/icons/master.svg#libregit"/>
                     </svg>
                 </span>
-                <p>{{ _('Escrito por') }}
-                    <a href="https://libregit.org/heckyel">libregit.org/heckyel</a>
+                <p itemprop='author' itemscope itemtype="https://schema.org/Person">{{ _('Escrito por') }}
+                    <a itemprop="url" href="https://libregit.org/heckyel">libregit.org/heckyel</a>
                 </p>
                 <p>{{ _('Este sitio es Software Libre') }}</p>
                 <p>
@@ -311,7 +311,7 @@
                     </span>
                 </p>
                 <p>
-                    <a href="{{ SITEURL }}/pages/librejs.html" data-jslicense="1">{{ _('Licencias de JavaScript') }}</a>
+                    <a itemprop="license" href="{{ SITEURL }}/pages/librejs.html" data-jslicense="1">{{ _('Licencias de JavaScript') }}</a>
                 </p>
             </div>
         </footer>
diff --git a/cl-theme/templates/base_info.html b/cl-theme/templates/base_info.html
index 29470b2..568dabb 100644
--- a/cl-theme/templates/base_info.html
+++ b/cl-theme/templates/base_info.html
@@ -8,7 +8,7 @@
     {% set año = article.date|strftime('%Y') %}
     {% set mes = article.date|strftime('%m') %}
     {% set nombre_mes = article.date|strftime('%B') %}
-    <time class="entry-date published"
+    <time class="entry-date published" itemprop="datePublished"
           datetime="{{ article.date.isoformat() }}">
         <small>
             {{ article.date|strftime('%a %-d') }}
@@ -23,29 +23,34 @@
     </time>
 
     {% if article.modified %}
-        <span class="soumaicon">
-            <svg>
-                <use href="{{ SITEURL }}/{{ THEME_STATIC_DIR }}/images/icons/master.svg#calendar" />
-            </svg>
-        </span>
-        <span class="edit-link"
-              title="{{ _('Fecha de modificación') }}">
-            <small class="screen-reader-text">{{ _('Modificado el %(fecha)s'|format(fecha='</small>
-            <time class="updated" datetime="%s"><small>%s</small></time>')|format(article.modified.isoformat(), article.locale_modified)) }}
-        </span>
+        <p>
+            <span class="soumaicon">
+                <svg>
+                    <use href="{{ SITEURL }}/{{ THEME_STATIC_DIR }}/images/icons/master.svg#calendar"></use>
+                </svg>
+            </span>
+            <span class="edit-link" title="{{ _('Fecha de modificación') }}">
+                <small class="screen-reader-text">{{ _('Modificado el') }} </small>
+                <time class="updated" datetime="{{ article.modified.isoformat() }}" itemprop="dateModified">
+                    <small>{{ article.locale_modified }}</small>
+                </time>
+            </span>
+        </p>
     {% endif %}
 
     {% if not HIDE_AUTHORS and article.authors %}
-        <span class="soumaicon">
-            <svg>
-                <use href="{{ SITEURL }}/{{ THEME_STATIC_DIR }}/images/icons/master.svg#user" />
-            </svg>
-        </span>
         {% for author in article.authors %}
-            <small>
-                <a href="{{ SITEURL }}/{{ author.url }}"
-                   title="{% trans %}Autor del artículo{% endtrans %}">{{ author }}</a>{% if not loop.last %}, {% endif %}
-            </small>
+            <p itemprop='author' itemscope itemtype="https://schema.org/Person">
+                <span class="soumaicon">
+                    <svg>
+                        <use href="{{ SITEURL }}/{{ THEME_STATIC_DIR }}/images/icons/master.svg#user" />
+                    </svg>
+                </span>
+                <small itemprop="name">
+                    <a href="{{ SITEURL }}/{{ author.url }}" itemprop="url"
+                       title="{% trans %}Autor del artículo{% endtrans %}">{{ author }}</a>{% if not loop.last %}, {% endif %}
+                </small>
+            </p>
         {% endfor %}
     {% endif %}
 
diff --git a/cl-theme/templates/index.html b/cl-theme/templates/index.html
index 21ea3a0..bc1f217 100644
--- a/cl-theme/templates/index.html
+++ b/cl-theme/templates/index.html
@@ -33,6 +33,6 @@
 {% endblock %}
 
 {% block sitename %}
-    <h1 class="title is-1 is-spaced">{{ SITENAME }}</h1>
+    <h1 class="title is-1 is-spaced" itemprop="name">{{ SITENAME }}</h1>
     <p class="subtitle is-4">{{ SITESUBTITLE }}</p>
 {% endblock %}
diff --git a/cl-theme/templates/page.html b/cl-theme/templates/page.html
index 31e8bf0..0f74eec 100644
--- a/cl-theme/templates/page.html
+++ b/cl-theme/templates/page.html
@@ -48,11 +48,11 @@
         <!-- start of pages -->
         <div class="columns is-multiline is-centered">
             <!-- start of page -->
-            <div class="column is-7">
+            <div class="column is-7" itemscope itemtype="https://schema.org/CreativeWork">
                 <div class="card">
                     <!-- post header -->
                     <div class="card-content-header">
-                        <h4 class="title is-4 has-text-centered">{{ page.title }}</h4>
+                        <h2 class="title is-4 has-text-centered" itemprop="name">{{ page.title }}</h2>
                     </div>
                     <!-- end of post header -->
                     <!-- post content -->