MDItemCopyAttributeNames not returning kMDItemTextContent

Hi,

I am logging all the attributes of my file with the following code:

MDItemRef item = MDItemCreate(NULL, (__bridge CFStringRef)path);

CFArrayRef attributeNames = MDItemCopyAttributeNames(item);
NSDictionary* attributes = CFBridgingRelease(MDItemCopyAttributes(item, attributeNames));

for(NSDictionary *key in attributes) {
  NSLog(@"[%@] = %@", key, [attributes objectForKey:key]);
}

CFRelease(item);

When I do the same with mdimport -d3 "path" I get the same properties but kMDItemTextContent. I tried calling MDItemCopyAttribute directly with that property and it returns nil. How do I get this property programmatically?

Thanks,

Pierre