Hi!<div>We don&#39;t have unused fields, but there is no problem to add your own prefix:</div><div><div><br></div><div>FileStream newFileNamed: &#39;demoMetadata.fuel&#39; do: [:aStream |</div><div><span class="Apple-tab-span" style="white-space:pre">	</span>aStream binary.</div>

<div><span class="Apple-tab-span" style="white-space:pre">	</span>aStream nextStringPut: &#39;metadata=5&#39;.</div><div><span class="Apple-tab-span" style="white-space:pre">	</span>FLSerializer newDefault�</div><div><span class="Apple-tab-span" style="white-space:pre">		</span>serialize: &#39;stuff&#39;�</div>

<div>�<span class="Apple-tab-span" style="white-space:pre">		</span>on: aStream ].</div><div><br></div><div>FileStream oldFileNamed: &#39;demoMetadata.fuel&#39; do: [:aStream |</div><div><span class="Apple-tab-span" style="white-space:pre">	</span>aStream binary.</div>

<div><span class="Apple-tab-span" style="white-space:pre">	</span>metadata := aStream nextString.</div><div><span class="Apple-tab-span" style="white-space:pre">	</span>stuff := (FLMaterializer newDefault�</div><div><span class="Apple-tab-span" style="white-space:pre">		</span>materializeFrom: aStream) root ].</div>

<div><br></div><div>Is this ok for you?</div><div><br></div><div>Best regards,</div><div>Martin</div><div><br></div><br><div class="gmail_quote">On Thu, Feb 9, 2012 at 8:25 PM, Yanni Chiu <span dir="ltr">&lt;<a href="mailto:yanni@rogers.com">yanni@rogers.com</a>&gt;</span> wrote:<br>

<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">I&#39;d like to store some metadata in a Fuel serialized file. I&#39;d like to be able to read that metadata, without de-serializing the file. So, if there were a fixed header at the start of the file, with some &quot;unused&quot; fields, that would be ideal.<br>


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