Extraer xml @attributes con php

[pips]

Hola de nuevo
Estoy extrayendo los datos de un xml con:

Código PHP:

  $xml =  simplexml_load_file("http://productoType=2",'SimpleXMLElement');
foreach($xml->product as $fila){
$fila->categories->category;
$fila->description
} 
   

Con $xml->xpath("/products") extraigo (p.e):

Código HTML:

[categories] => SimpleXMLElement Object ( [category] => Zapas ) 

[properties] => SimpleXMLElement Object ( 
	[property] => 
		Array ( 
		[0] => SimpleXMLElement Object ( [@attributes] => 
			Array ( 
				[name] => VAL) 
				[value] => 1111111 ) 
		[1] => SimpleXMLElement Object ( [@attributes] => 
			Array ( 
				[name] => manufacturer ) 
				[value] => Nike) 
		[2] => SimpleXMLElement Object ( [@attributes] => 
			Array ( 
				[name] => condition ) 
				[value] => new ) 
		[3] => SimpleXMLElement Object ( [@attributes] => 
			Array ( 
				[name] => deliveryCosts ) 
				[value] => 0.00 ) 
		[4] => SimpleXMLElement Object ( [@attributes] => 
			Array ( 
				[name] => stock ) 
				[value] => in stock ) 
		) )

categories lo extraigo sin problemas $fila->categories->category
El p roblema lo tengo con esta secuencia:

Código HTML:

[1] => SimpleXMLElement Object ( [@attributes] => 
			Array ( 
				[name] => manufacturer ) 
				[value] => Nike)

Con $marca= (string)$fila->properties->property[1]->attributes(); coonsigo extraer la palabra manufacturer, mi objetivo es conseguir extraer la palabra Nike.
He intentado con:
$marca= (string)$fila->properties->property[1]->attributes()->value; //creo que debería ser la correcta.
$marca= (string)$fila->properties->property[1]->attributes()->value[0];
$marca= (string)$fila->properties->property[1][0]->attributes()->value;
$marca= (string)$fila->properties->property[1][1]->attributes();
$marca= (string)$fila->properties->property[1]->attributes(value);
y etc..
A alguien le ha pasado lo mismo? A alguien se le ocurre algo? un saludo gracias....