Question about <uri> on Fortress

edit

So I've decided to try and create a blanket for ignition just to practice on my skill. So I came up with an idea by import a piece of blanket over and over.

So, I wanted to try one piece only.

This is a piece of blanket which is ready to be imported by another file.

So, I created a different file just to import a piece of blanket.

This section doesn't allow me to import due to no file found:

    <include>
        <static>false</static>
        <name>piece_00</name>
        <pose>0 0 0 0 0 0</pose>
        <uri>blanket.sdf</uri>
    </include>

But I have the blanket.sdf in the same folder as this file.

So the error output is this:

[Err] [Server.cc:183] Error Code 13: [/sdf/world[@name="testing_physics"]/include[0]/uri:/home/bwuk/Ignition-Gazebo-blanket/model/blanket_in_a_world.sdf:L44]: Msg: Unable to find uri[model://blanket.sdf]
bwuk@robots:~/Ignition-Gazebo-blanket$ ign gazebo -r model/blanket_in_a_world.sdf 
[Err] [Server.cc:183] Error Code 13: [/sdf/world[@name="testing_physics"]/include[0]/uri:/home/bwuk/Ignition-Gazebo-blanket/model/blanket_in_a_world.sdf:L44]: Msg: Unable to find uri[blanket.sdf]
bwuk@robots:~/Ignition-Gazebo-blanket$ ign gazebo -r model/blanket_in_a_world.sdf 
[Err] [Server.cc:183] Error Code 13: [/sdf/world[@name="testing_physics"]/include[0]/uri:/home/bwuk/Ignition-Gazebo-blanket/model/blanket_in_a_world.sdf:L44]: Msg: Unable to find uri[blanket]
bwuk@robots:~/Ignition-Gazebo-blanket$ ign gazebo -r model/blanket_in_a_world.sdf 
[Err] [Server.cc:183] Error Code 13: [/sdf/world[@name="testing_physics"]/include[0]/uri:/home/bwuk/Ignition-Gazebo-blanket/model/blanket_in_a_world.sdf:L44]: Msg: Unable to find uri[model://blanket.sdf]
bwuk@robots:~/Ignition-Gazebo-blanket$ ign gazebo -r model/blanket_in_a_world.sdf 
[Err] [Server.cc:183] Error Code 13: [/sdf/world[@name="testing_physics"]/include[0]/uri:/home/bwuk/Ignition-Gazebo-blanket/model/blanket_in_a_world.sdf:L84]: Msg: Unable to find uri[model://blanket.sdf]
bwuk@robots:~/Ignition-Gazebo-blanket$ ign gazebo -r model/blanket_in_a_world.sdf 
[Err] [Server.cc:183] Error Code 13: [/sdf/world[@name="testing_physics"]/include[0]/uri:/home/bwuk/Ignition-Gazebo-blanket/model/blanket_in_a_world.sdf:L84]: Msg: Unable to find uri[model://blanket]
bwuk@robots:~/Ignition-Gazebo-blanket$ ign gazebo -r model/blanket_in_a_world.sdf 
[Err] [Server.cc:183] Error Code 13: [/sdf/world[@name="testing_physics"]/include[0]/uri:/home/bwuk/Ignition-Gazebo-blanket/model/blanket_in_a_world.sdf:L84]: Msg: Unable to find uri[blanket]
bwuk@robots:~/Ignition-Gazebo-blanket$ ign gazebo -r model/blanket_in_a_world.sdf 
[Err] [Server.cc:183] Error Code 13: [/sdf/world[@name="testing_physics"]/include[0]/uri:/home/bwuk/Ignition-Gazebo-blanket/model/blanket_in_a_world.sdf:L84]: Msg: Unable to find uri[blanket.sdf]

As you can see I tried all different ways.

What is the right way to import a model from other file?

Version: Fortress. (I'm addicted with this one!)