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<concept xml:lang="en" id="GUID-50196C0E-39AF-5E94-888B-9901C934CCE7"><title>Introduction to the store map </title><prolog><metadata><keywords/></metadata></prolog><conbody><p>A store map is useful when externalising swizzled in-memory objects. It has three main characteristics:</p> <ul><li id="GUID-3914A6F8-3EE4-5197-B5A7-773B5C26D3C3"><p>it acts as an in-memory repository of stream IDs and associated Swizzle objects</p> </li> <li id="GUID-F8D02A47-B890-5631-8519-BF63C56ED1C1"><p>it acts as an externaliser for Swizzles</p> </li> <li id="GUID-52B4416B-F0D4-5839-AA8C-9213D4983CD4"><p>it offers cleanup support</p> </li> </ul> <p>A store map is an object of type <codeph>CStoreMap</codeph>.</p> <section><title>See also</title> <p><xref href="GUID-53112730-5871-5920-8861-D2F6BF1595BC.dita">Swizzles and deferred loading</xref> </p> </section> </conbody></concept>