diff --git a/codemeta_generation.js b/codemeta_generation.js
--- a/codemeta_generation.js
+++ b/codemeta_generation.js
@@ -17,6 +17,7 @@
 }
 
 function getIfSet(query) {
+    console.log(query)
     return emptyToUndefined(document.querySelector(query).value);
 }
 
@@ -36,6 +37,24 @@
     'issueTracker',
     'name',
     'version',
+    'identifier',
+    'description',
+    'applicationCategory',
+    //keywords TODO:keywords array 
+    'releaseNotes',
+    'funding',
+    'runtimePlatform',
+    //softwareRequiremnts,
+    'operatingSystem',
+    'developmentStatus',
+    //relatedLink
+    'programmingLanguage',
+    'isPartOf',
+    //'referencePublication'
+    //      "@type": "ScholarlyArticle",
+    //      "idendifier": "https://doi.org/xx.xxxx/xxxx.xxxx.xxxx",
+    //      "name": "title of publication"
+    
 ];
 
 // Names of codemeta properties with a matching HTML field name,
@@ -44,6 +63,11 @@
     'givenName',
     'familyName',
     'email',
+    'affiliation'   
+];
+
+const directKeywordCodemetaFields = [
+    'keyword'
 ];
 
 function generatePerson(idPrefix) {
@@ -69,6 +93,25 @@
     return persons;
 }
 
+function generateArray(idPrefix,prefix) {
+    console.log(idPrefix)
+    console.log(prefix)
+    return getIfSet(`#${idPrefix}_${prefix}`);
+}
+
+function generateArrays(prefix) {
+    console.log(prefix)
+    var array = [];
+    var nbArray = getNbArray(prefix);
+    console.log(nbArray)
+
+    for (let ArrayId = 1; ArrayId <= nbArray; ArrayId++) {
+        array.push(generateArray(`${prefix}_${ArrayId}`,prefix));
+    }
+
+    return array;
+}
+
 function generateCodemeta() {
     var inputForm = document.querySelector('#inputForm');
     var codemetaText, errorHTML;
@@ -89,6 +132,8 @@
         doc = Object.assign(doc, {
             "author": generatePersons('author'),
             "contributor": generatePersons('contributor'),
+            "keyword" : generateArrays('keyword'),
+            "software_requirements" : generateArrays('software_requirements'),
         });
 
         codemetaText = JSON.stringify(doc, null, 4);
diff --git a/dynamic_form.js b/dynamic_form.js
--- a/dynamic_form.js
+++ b/dynamic_form.js
@@ -7,6 +7,7 @@
 
 "use strict";
 
+/////////////////BEGIN-PERSONS 
 function createPersonFieldset(personPrefix, legend) {
     // Creates a fieldset containing inputs for informations about a person
     var fieldset = document.createElement("fieldset")
@@ -35,6 +36,11 @@
             <input type="url" id="${personPrefix}_id" name="${personPrefix}_id"
                 placeholder="http://orcid.org/0000-0002-1825-0097" />
         </p>
+        <p>
+        <label for="${personPrefix}_affiliation">Affiliation</label>
+            <input type="url" id="${personPrefix}_affiliation" name="${personPrefix}_affiliation"
+                placeholder="Department of Computer Science, University of Pisa" />
+        </p>
     `;
 
     return fieldset;
@@ -84,6 +90,71 @@
         removePerson(prefix)
     }
 }
+/////////////////END-PERSONS 
+
+/////////////////BEGIN-ARRAYS
+function createArrayFieldset(prefix, legend, postfix) {
+    // Creates a fieldset containing inputs for informations about an array field
+    var fieldset = document.createElement(`fieldset_${prefix}`)
+    fieldset.classList.add(prefix);
+    fieldset.id = prefix;
+    
+    fieldset.innerHTML = `
+        <legend>${legend}</legend>
+        <p>
+            <label for="${prefix}_${postfix}">${legend}</label>
+            <input type="text" id="${prefix}_${postfix}" name="${prefix}_${postfix}"
+                placeholder="Cool-stuff" required="true" />
+        </p>
+    `;
+
+    return fieldset;
+}
+
+function addArrayWithId(container, prefix, legend, id) {
+    var fieldset = createArrayFieldset(`${prefix}_${id}`, `${legend} #${id}`,`${prefix}`);
+
+    container.appendChild(fieldset);
+}
+
+function addArray(prefix, legend) {
+    var container = document.querySelector(`#${prefix}_container`);
+    var ArrayId = getNbArray(prefix) + 1;
+    addArrayWithId(container, prefix, legend, ArrayId);
+
+    setNbArray(prefix, ArrayId);
+
+    return ArrayId;
+}
+
+function removeArray(prefix) {
+    var ArrayId = getNbArray(prefix);
+
+    document.querySelector(`#${prefix}_${ArrayId}`).remove();
+
+    setNbPersons(prefix, ArrayId-1);
+}
+
+// Initialize a group of keywords on page load.
+// Useful if the page is reloaded.
+function initArrays(prefix, legend) {
+    var nbArray = getNbArray(prefix);
+    var ArrayContainer = document.querySelector(`#${prefix}_container`)
+
+    for (let ArrayId = 1; ArrayId <= nbArray; ArrayId++) {
+        addKeywordWithId(ArrayContainer, prefix, legend, ArrayId);
+    }
+}
+
+function removeArray(prefix) {
+    var nbArray = getNbArray(prefix);
+    var ArrayContainer = document.querySelector(`#${prefix}_container`)
+
+    for (let ArrayId = 1; ArrayId <= nbArray; ArrayId++) {
+        removeArray(prefix)
+    }
+}
+/////////////////END-KEYWORDS 
 
 function resetForm() {
     removePersons('author');
@@ -112,4 +183,6 @@
 
     initPersons('author', 'Author');
     initPersons('contributor', 'Contributor');
+    initArrays('keyword', 'Keyword');
+    initArrays('software_requirements', 'Software Requirements');
 }
diff --git a/fields_data.js b/fields_data.js
--- a/fields_data.js
+++ b/fields_data.js
@@ -10,6 +10,7 @@
 var SPDX_LICENSES = null;
 var SPDX_LICENSE_IDS = null;
 
+
 function initSpdx() {
     var xhr = new XMLHttpRequest();
     xhr.open('GET', './data/spdx/licenses.json', true);
diff --git a/index.html b/index.html
--- a/index.html
+++ b/index.html
@@ -26,10 +26,48 @@
 
             <p title="The name of the software">
                 <label for="name">Name</label>
-                <input type="text" name="name" id="name"
+                <input type="text" name="name" id="name" aria-describedby="name_descr"
                     placeholder="My Software" required="true" />
+                <div class="field-description" id="name_descr">the software title</div>
             </p>
 
+
+            <p title="Unique identifier">
+                <label for="identifier">Unique identifier</label>
+                <input type="text" name="identifier" id="identifier"
+                    placeholder="10.151.xxxxx"  />
+                    <div class="field-description">such as ISBNs, GTIN codes, UUIDs etc..  <a href="http://schema.org/identifier">http://schema.org/identifier</a> </div>
+            </p> 
+            <!-- TODO:define better
+            
+            I looked at the schema.org definition of identifier (https://schema.org/identifier),
+            it can be text, url or PropertyValue.
+            Used as follows in data representation with microdata:
+
+            <div property="identifier" typeof="PropertyValue">
+            <span property="propertyID">DOI</span>: 
+            <span property="value">10.151.xxxxx</span>
+            </div>
+            we can use that with identifier-type and identifier-value to have a clearer idea 
+            of what needs to be in the input.
+            
+            -->
+
+            <p title="Type of the software application">
+                <label for="applicationCategory">Application category</label>
+                <input type="text" name="applicationCategory" id="applicationCategory"
+                    placeholder="Astronomy"  />
+            </p>
+
+            <p title="a brief description of the software">
+                <label for="description">Description</label>
+                <br>
+                <textarea rows="4" cols="50" 
+                    name="description" id="description"
+                    placeholder="My Software computes ephemerides and orbit propagation. It has been developed from early ´80." ></textarea>
+            </p> 
+            
+
             <p title="The date on which the software was created.">
                 <label for="dateCreated">Creation date</label>
                 <input type="text" name="dateCreated" id="dateCreated"
@@ -44,9 +82,10 @@
 
             <p>
                 <label for="license">License</label>
-                <input list="licenses" name="license" id="license">
+                <input list="licenses" name="license" id="license" aria-describedby="licenses_descr">
                 <datalist id="licenses">
-                </datalist>
+                </datalist> <!-- TODO: insert placeholder -->
+                <div class="field-description" id="licenses_descr">from <a href="https://spdx.org/license-list">SPDX licence list</a></div>
             </p>
         </fieldset>
 
@@ -86,8 +125,102 @@
                 <input type="text" name="dateModified" id="dateModified"
                     placeholder="YYYY-MM-DD" pattern="\d{4}-\d{2}-\d{2}" />
             </p>
+
+            <p title="a brief description of the software">
+                <label for="releaseNotes">Release notes</label>
+                <br>
+                <textarea rows="4" cols="50" 
+                    name="releaseNotes" id="releaseNotes"
+                    placeholder=
+"Change log: this and that; 
+Bugfixes: that and this." ></textarea>
+            </p> 
+
+            <fieldset class="keywords" id="keyword_container">
+                <legend>Keywords</legend>
+    
+                <p>Order of keywords does not matter.</p>
+    
+                <input type="hidden" id="keyword_nb" value="0" />
+                <div id="addRemoveKeyword">
+                    <input type="button" id="keyword_add" value="Add one"
+                        onclick="addArray('keyword', 'Keyword');" />
+                    <input type="button" id="keyword_remove" value="Remove last"
+                        onclick="removeArray('keyword');" />
+                </div>
+            </fieldset>
+
+            <fieldset class="software_requirements" id="software_requirements_container">
+                <legend>Software requirements</legend>
+
+                <p>Order of Software requirements does not matter.</p>
+
+                <input type="hidden" id="software_requirements_nb" value="0" />
+                <div id="addRemoveSoftware_requirements">
+                    <input type="button" id="software_requirements_add" value="Add one"
+                        onclick="addArray('software_requirements', 'Software requirements');" />
+                    <input type="button" id="software_requirements_remove" value="Remove last"
+                        onclick="removeArray('software_requirements');" />
+                </div>
+            </fieldset>
+
+<!--TODO: related links as URL array -->
+
+<!--TODO: referencePublication as ScholarlyArticle array -->
+
         </fieldset>
 
+        <fieldset id="fieldsetAdditionalInfo">
+                <legend>Additional Info</legend>
+                <p title="Funding">
+                    <label for="funding">Funding</label>
+                    <input type="text" name="funding" id="funding" aria-describedby="funding_descr"
+                        placeholder="Università di Pisa (PRA_2018_73)"/>
+                    <div class="field-description" id="funding_descr">software funded by (e.g. specific grant)</div>
+                </p>
+    
+                <p title="Runtime Platform">
+                    <label for="runtimePlatform">Runtime Platform</label>
+                    <input type="text" name="runtimePlatform" id="runtimePlatform"
+                        placeholder="Python2.3"  />
+                </p>
+    
+                <p title="Operating System">
+                    <label for="operatingSystem">Operating System</label>
+                    <input type="text" name="operatingSystem" id="operatingSystem"
+                        placeholder="Android 1.6"  />
+                </p>
+    
+                <p title="Development Status">
+                <label for="developmentStatus">Development Status</label>
+                    <datalist id="developmentStatuses">
+                            <option value="Concept">
+                            <option value="WIP">
+                            <option value="Suspended">
+                            <option value="Abandoned">
+                            <option value="Active">
+                            <option value="Inactive">
+                            <option value="Unsupported">
+                            <option value="Moved">
+                    </datalist>
+                    <input list="developmentStatuses" id="developmentStatus" aria-describedby="developmentStatuses_descr" 
+                    pattern="Concept|WIP|Suspended|Abandoned|Active|Inactive|Unsupported|Moved">
+                    <div class="field-description" id="developmentStatuses_descr">see <a href="http://www.repostatus.org">www.repostatus.org</a> for details</div>
+                </p>
+    
+                <p title="Programming Language">
+                    <label for="programmingLanguage">Programming Language</label>
+                    <input type="text" name="programmingLanguage" id="programmingLanguage"
+                        placeholder="C#"  />
+                </p> <!-- TODO: We should add support for multiple languages, eg. by splitting on commas when exporting. -->
+    
+                <p title="Part of">
+                    <label for="isPartOf">I part of </label>
+                    <input type="URL" name="isPartOf" id="isPartOf"
+                        placeholder="http://The.Bigger.Framework.org"  />
+                </p>
+            </fieldset>
+
         <fieldset class="persons" id="author_container">
             <legend>Authors</legend>
 
@@ -115,6 +248,7 @@
                     onclick="removePerson('contributor');" />
             </div>
         </fieldset>
+
     </form>
     <form>
         <input type="button" id="generateCodemeta" value="Generate Codemeta" />
diff --git a/style.css b/style.css
--- a/style.css
+++ b/style.css
@@ -5,11 +5,12 @@
  * See top-level LICENSE file for more information
  */
 
+
 .person {
     display: inline-block;
 }
 
-#fieldsetSoftwareItself, #fieldsetDevelopmentCommunity, #fieldsetCurrentVersion {
+#fieldsetSoftwareItself, #fieldsetDevelopmentCommunity, #fieldsetCurrentVersion, #fieldsetAdditionalInfo {
     display: inline-block;
 }
 
@@ -18,10 +19,19 @@
     min-width: 20em;
 }
 
+#funding {
+    /* Funding names are long */
+    min-width: 20em;
+}
+
 input[type=URL] {
     /* URLs are longer than the other fields */
     min-width: 20em;
 }
+.field-description {
+    color : rgb(100, 104, 103);
+    font-size: small;
+}
 
 #codemetaText {
     width: 100%;
@@ -32,3 +42,8 @@
 #errorMessage {
     color: red;
 }
+
+input:invalid {
+    color: red;
+}
+  
diff --git a/utils.js b/utils.js
--- a/utils.js
+++ b/utils.js
@@ -17,6 +17,16 @@
     nbField.value = nb;
 }
 
+function getNbArray(prefix) {
+    var nbField = document.querySelector(`#${prefix}_nb`);
+    return parseInt(nbField.value, 10);
+}
+
+function setNbArray(prefix, nb) {
+    var nbField = document.querySelector(`#${prefix}_nb`);
+    nbField.value = nb;
+}
+
 function setError(msg) {
     document.querySelector("#errorMessage").innerHTML = msg;
 }