Import multiple values to tag vocabulary

Would the same thing apply for taxonomy.inc?

For example, using a free tagging - multitag 'Categories' vocabulary:

Source -> Target:
------------------
Category Level 1 -> Categories
Category Level 2 -> Categories
Category Level 3 -> Categories

The result is, only Level 3 is stored in Categories, 1 & 2 are lost.

In mappers/taxonomy inc, I think this is the solution, change:

  if ($vocab->tags) {
    // Simply add a comma separated list to the node for a "tags" vocabulary.
    $node->taxonomy['tags'][$vocab->vid] = implode(',', $terms);
  }

to this:

  if ($vocab->tags) {
    // Simply add a comma separated list to the node for a "tags" vocabulary.
    $terms = array_merge($terms, explode(',', $node->taxonomy['tags'][$vocab->vid]));
    $node->taxonomy['tags'][$vocab->vid] = implode(',', $terms);
  }

I still need to test this.

I tested the patches (mine attached now), and they really work.

My patch is for 6x10-beta4, but it should apply to latest dev.

If the maintainers feel they should be part of feeds, please include them.

On a side not, my patch might need array_unique to reduce duplicates,

$terms = array_unique(array_merge($terms, explode(',', $node->taxonomy['tags'][$vocab->vid]));

Unless Drupal does this anyway.