EDIT

<?php

/**

 * Returns the localized representations of the modifiers hold by the supplied cdm instance concatenated into one string.

 *

 * @param object $iModifieable

 *   cdm instance of an class implementing the interface IModifieable: DescriptionElementBase, StateDate, State

 */

function cdm_modifers_representations($iModifieable, $glue = ', ') {

  $modifiers_strings = array();

    foreach ($iModifieable->modifiers as $modifier) {

      $modifiers_strings[] = cdm_term_representation($modifier);

    }

  return implode(', ', $modifiers_strings);

 * Filters the given set of description elements and prefers computed elements over

 * others. Computed description elements are identified by the MarkerType.COMPUTED()

 *

 * If the given set contains at least one computed element only the computed elements

 * returned.

 *

 * @param $description_elements

 *   An array of CDM DescriptionElementBase instances

 * @return only the computed description elements otherwise all others.

function cdm_description_elements_prefer_computed($description_elements){

  $computed_elements = array();

  $other_elements = array();

  if(!empty($description_elements)){

    foreach ($description_elements as $element) {

      if(cdm_entity_has_marker($element, UUID_MARKERTYPE_COMPUTED)){

        $computed_elements[] = $element;

      } else {

        $other_elements[] = $element;

      }

    }

  }

  if(count($computed_elements) > 0) {

    return $computed_elements;

  } else {

    return $other_elements;

  }

  $cdm_distribution_filter = get_array_variable_merged(CDM_DISTRIBUTION_FILTER, CDM_DISTRIBUTION_FILTER_DEFAULT);

  $query = array();

  if($cdm_distribution_filter['filter_rules']['statusOrderPreference']){

    $query['statusOrderPreference'] = 1;

  }

  if($cdm_distribution_filter['filter_rules']['subAreaPreference']){

    $query['subAreaPreference'] = 1;

  }

  if(is_array($cdm_distribution_filter['hideMarkedAreas']) && count($cdm_distribution_filter['hideMarkedAreas']) > 0){

    $query['hideMarkedAreas'] = '';

    foreach ($cdm_distribution_filter['hideMarkedAreas'] as $marker_type => $enabled)

      if($enabled){

        $query['hideMarkedAreas'] .= ($query['hideMarkedAreas'] ? ',' : '') . $marker_type;

      }

  }

  return $query;

}

 * Merge the fields 'annotations', 'markers', 'sources', 'media' from the source CDM DescriptionElement into  the target.

 *

 * @param $target

 *     The source CDM DescriptionElement

 * @param $source

 *     The target CDM DescriptionElement

 */

function cdm_merge_description_elements(&$target, &$source){

  static $fields_to_merge = array('annotations', 'markers', 'sources', 'media');

  foreach ($fields_to_merge as $field){

    if(is_array($source->$field)) {

      if(!is_array($target->$field)){

        $target->$field = $source->$field;

      } else {

        $target->$field = array_merge($target->$field, $source->$field);

      }

    }

  }

/**

 * Prepares the items for a table of content list.

 *

 * see also hook_cdm_feature_node_toc_items_alter()

 *

 * @param $feature_nodes

 *   An array of CDM FeatureNode instances

 *

 * @return array

 *   The items array is an array suitable for theme_item_list().

 */

function cdm_feature_node_toc_items($feature_nodes) {

  $items = array();

  foreach ($feature_nodes as $node) {

      $class_attributes = 'feature-toc-item-' . $node->feature->uuid;

      if ($node->feature->uuid != UUID_IMAGE) {

          theme(

            'cdm_feature_name',

            array('feature_name' => $feature_name))

          ,

          array('class' => $class_attributes)

      }

    }

  }

  return $items;

 * Prepares an empty Drupal block for displaying description elements of a specific CDM Feature.

 *

 * The block can also be used for pseudo Features like a bibliography. Pseudo features are

 * derived from other data on the fly and so not exist as such in the cdm data. In case

 * of pseudo features the $feature is left empty

 *

 * @param $feature_name

 *    A label describing the feature, usually the localized feature representation.

 * @param $feature

 *    The CDM Feature for which the block is created. (optional)

 * @return object

 *    A Drupal block object

 */

function feature_block($feature_name, $feature = null) {

  $block = new stdclass(); // Empty object.

  $block->module = 'cdm_dataportal';

  $block->delta = generalizeString($feature_name);

  $block->region = null;

  $block->subject = '<a name="' . $block->delta . '"></a><span class="' . html_class_attribute_ref($feature) . '">'

    . theme('cdm_feature_name', array('feature_name' => $feature_name))

    . '</span>';

  $block->module = "cdm_dataportal-feature";

  $block->content = '';

  return $block;

}

/**

 * Creates a list item for a table of content, suitable as data element for a themed list

 *

 * @see theme_list()

 *

 * @param $label

 * @param $http_request_params

 * @param $attributes

 * @return array

 */

function toc_list_item($label, $attributes = array()) {

  // we better cache here since drupal_get_query_parameters has no internal static cache variable

  $http_request_params = drupal_static('http_request_params', drupal_get_query_parameters());

  $item =  array(

    'data' => l(

      $label,

      $_GET['q'],

      array(

        'attributes' => array('class' => array('toc')),

        'fragment' => generalizeString($label),

        'query' => $http_request_params

      )

    )

  );

  $item['attributes'] = $attributes;

  return $item;

}

 * Creates the footnotes for the given CDM DescriptionElement instance.

 *

 * Footnotes are created for annotatins and original sources.

 *

 * @param $descriptionElement

 *     A CDM DescriptionElement instance

  $original_source_footnote_tag = $bibliography_settings['enabled'] == 1 ? 'div' : null; // otherwise the default

    if (_is_original_source_type($source)) {

          'doLink' => FALSE,

        $original_source_footnote_tag

      );

      cdm_add_footnote_to_array($footNoteKeys, $fn_key);

    }

  }

  // Sort and render footnote keys.

  $footnoteKeyListStr = '';

  asort($footNoteKeys);

  foreach ($footNoteKeys as $footNoteKey) {

      array(

        'footnoteKey' => $footNoteKey,

        'separator' => ($footnoteKeyListStr ? $separator : '')));

  return $footnoteKeyListStr;

 *

 * @return string the footnote_list_key

 */

function original_source_footnote_list_key($key_suggestion = null) {

  if(!$key_suggestion){

    $key_suggestion = RenderHints::getFootnoteListKey();

  }

  $footnote_list_key = $bibliography_settings['enabled'] == 1 ? 'BIBLIOGRAPHY' : $key_suggestion;

}