user63616: I am a newbie to Bitcoin.
Looking at 
curl https://blockchain.info/unspent?active=1Cdid9KFAaatwczBwBttQcwXYCpvK8h7FK

I guess that the script is the owner's address.I am not sure about this.
"unspent_outputs":[

        {
            "tx_hash":"f2c245c38672a5d8fba5a5caa44dcef277a52e916a0603272f91286f2b052706",
            "tx_hash_big_endian":"0627052b6f28912f2703066a912ea577f2ce4da4caa5a5fbd8a57286c345c2f2",
            "tx_index":47854970,
            "tx_output_n": 1,
            "script":"76a9147f9b1a7fb68d60c536c2fd8aeaa53a8f3cc025a888ac",
            "value": 8450000,
            "value_hex": "0080efd0",
            "confirmations":258278
        },

What do tx_hash,tx_hash_big_endian,tx_index,tx_output_n and value stand for?

user13866: 
I guess that the script is the owner's address.I am not sure about this.

According to https://en.bitcoin.it/wiki/Script

Bitcoin uses a scripting system for transactions. Forth-like, Script is simple, stack-based, and processed from left to right. It is intentionally not Turing-complete, with no loops.
A script is essentially a list of instructions recorded with each transaction that describe how the next person wanting to spend the Bitcoins being transferred can gain access to them.

In your example




Hex
script operation
Effect




0x76
OP_DUP
Duplicates the top stack item


0xa9
OP_HASH160
Hashes top stack item with SHA-256 then with RIPEMD-160.


7f9b1a7fb68d60c536c2fd8aeaa53a8f3cc025a8
data
-


0x88
OP_EQUALVERIFY
Compares top two stack items


0xac
OP_CHECKSIG
Computes transaction hash and verifies signature




See Bitcoin script example
The above is a standard script which requires the spender to prove that they own the destination address of an unspent transaction output. The data in it is a hash of a public-key. Inputs prepended to the script are a signature and public key

user76567: tx_hash and tx_hash_big_endian are the transaction id of the transaction that this output originated from in little endian and big endian (reversed). 
tx_output_n is the number of the output in the referenced transaction, i.e if a transaction has 5 outputs and you need to refer to the 5th you use a tx_output_n = 5.
tx_index I believe is an internal unique key that blockchain.info uses to identify transactions
script is the ScriptPubKey of the output, that is the conditions you need to fullfill to be able to redeem the coins.

63616: <p>I am a newbie to Bitcoin.
Looking at </p>

<pre><code>curl https://blockchain.info/unspent?active=1Cdid9KFAaatwczBwBttQcwXYCpvK8h7FK
</code></pre>

<p>I guess that the script is the owner's address.I am not sure about this.</p>

<pre><code>"unspent_outputs":[

        {
            "tx_hash":"f2c245c38672a5d8fba5a5caa44dcef277a52e916a0603272f91286f2b052706",
            "tx_hash_big_endian":"0627052b6f28912f2703066a912ea577f2ce4da4caa5a5fbd8a57286c345c2f2",
            "tx_index":47854970,
            "tx_output_n": 1,
            "script":"76a9147f9b1a7fb68d60c536c2fd8aeaa53a8f3cc025a888ac",
            "value": 8450000,
            "value_hex": "0080efd0",
            "confirmations":258278
        },
</code></pre>

<p>What do tx_hash,tx_hash_big_endian,tx_index,tx_output_n and value stand for?</p>
 13866: <blockquote>
<p><strong>I guess that the script is the owner's address.I am not sure about this.</strong></p>
</blockquote>
<p>According to <a href="https://en.bitcoin.it/wiki/Script" rel="nofollow noreferrer">https://en.bitcoin.it/wiki/Script</a></p>
<blockquote>
<p>Bitcoin uses a scripting system for transactions. Forth-like, Script is simple, stack-based, and processed from left to right. It is intentionally not Turing-complete, with no loops.</p>
<p>A script is essentially a list of instructions recorded with each transaction that describe how the next person wanting to spend the Bitcoins being transferred can gain access to them.</p>
</blockquote>
<p>In your example</p>
<div class="s-table-container">
<table class="s-table">
<thead>
<tr>
<th>Hex</th>
<th>script operation</th>
<th>Effect</th>
</tr>
</thead>
<tbody>
<tr>
<td>0x76</td>
<td>OP_DUP</td>
<td>Duplicates the top stack item</td>
</tr>
<tr>
<td>0xa9</td>
<td>OP_HASH160</td>
<td>Hashes top stack item with SHA-256 then with RIPEMD-160.</td>
</tr>
<tr>
<td>7f9b1a7fb68d60c536c2fd8aeaa53a8f3cc025a8</td>
<td>data</td>
<td>-</td>
</tr>
<tr>
<td>0x88</td>
<td>OP_EQUALVERIFY</td>
<td>Compares top two stack items</td>
</tr>
<tr>
<td>0xac</td>
<td>OP_CHECKSIG</td>
<td>Computes transaction hash and verifies signature</td>
</tr>
</tbody>
</table>
</div>
<p>See <a href="https://bitcoin.stackexchange.com/q/2251/13866">Bitcoin script example</a></p>
<p>The above is a <a href="https://en.bitcoin.it/wiki/Script#Standard_Transaction_to_Bitcoin_address_.28pay-to-pubkey-hash.29" rel="nofollow noreferrer">standard script</a> which requires the spender to prove that they own the destination address of an unspent transaction output. The data in it is a hash of a public-key. Inputs prepended to the script are a signature and public key</p>
 76567: <p><code>tx_hash</code> and <code>tx_hash_big_endian</code> are the transaction id of the transaction that this output originated from in little endian and big endian (reversed). </p>

<p><code>tx_output_n</code> is the number of the output in the referenced transaction, i.e if a transaction has 5 outputs and you need to refer to the 5th you use a <code>tx_output_n</code> = 5.</p>

<p><code>tx_index</code> I believe is an internal unique key that blockchain.info uses to identify transactions</p>

<p><code>script</code> is the ScriptPubKey of the output, that is the conditions you need to fullfill to be able to redeem the coins.</p>
