user24755: What does it mean when an output has a value of zero and no address?  I'm looking at some fairly recent transactions, and I don't understand what this means.  Here's an example: https://blockchain.info/block-height/348120?format=json.
You can find the transactions quickly if you search that page for "value":0.

user2306: The outputs have no address because they are data-carrying outputs. 
  {
     "spent":false,
     "tx_index":80899271,
     "type":0,
     "value":0,
     "n":3,
     "script":"6a144153435249424553504f4f4c5245474953544552"
  }

The script argument is the serialized equivalent of 
OP_RETURN 4153435249424553504f4f4c5245474953544552

(The hex decodes to "ASCRIBESPOOLREGISTER")
OP_RETURN means that all attempts to spend this output will fail. This can't be spent, so there's no point in putting money in it - it would just be lost.

24755: <p>What does it mean when an output has a value of zero and no address?  I'm looking at some fairly recent transactions, and I don't understand what this means.  Here's an example: <a href="https://blockchain.info/block-height/348120?format=json" rel="nofollow">https://blockchain.info/block-height/348120?format=json</a>.</p>

<p>You can find the transactions quickly if you search that page for <code>"value":0</code>.</p>
 2306: <p>The outputs have no address because they are data-carrying outputs. </p>

<pre><code>  {
     "spent":false,
     "tx_index":80899271,
     "type":0,
     "value":0,
     "n":3,
     "script":"6a144153435249424553504f4f4c5245474953544552"
  }
</code></pre>

<p>The <code>script</code> argument is the serialized equivalent of </p>

<pre><code>OP_RETURN 4153435249424553504f4f4c5245474953544552
</code></pre>

<p>(The hex decodes to "ASCRIBESPOOLREGISTER")</p>

<p><code>OP_RETURN</code> means that all attempts to spend this output will fail. This can't be spent, so there's no point in putting money in it - it would just be lost.</p>
