Determining object type from id

If I issue a request like (to link.getLinksFrom) -
<?xml version="1.0"?>
<methodCall>
<methodName>link.getLinksFrom</methodName>
<params><param><value><string>10100</string></value></param></params>
</methodCall>

- I get a response that is an array of structures like -

<struct>
<member><name>label</name><value><string>OGo669160</string></value></member>
<member><name>source</name><value><string>skyrix://.../10100</string></value></member>
<member><name>type</name><value><string>generic</string></value></member>
<member><name>id</name><value><string>skyrix://.../1580570</string></value></member>
<member><name>target</name><value><string>skyrix://.../669160</string></value></member>
</struct>

- which is good.  But is there a mechanism for determining what type of
object (appointment, contact, enterprise, etc...) that
"skyrix://.../669160" is?

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