flectra/addons/product/views/product_uom_views.xml

<?xml version="1.0" encoding="utf-8"?>
<flectra>
    <record id="product_uom_tree_view" model="ir.ui.view">
        <field name="name">product.uom.tree</field>
        <field name="model">product.uom</field>
        <field name="arch" type="xml">
            <tree string="Units of Measure">
                <field name="name"/>
                <field name="category_id"/>
                <field name="uom_type"/>
            </tree>
        </field>
    </record>

    <record id="product_uom_form_view" model="ir.ui.view">
        <field name="name">product.uom.form</field>
        <field name="model">product.uom</field>
        <field name="arch" type="xml">
            <form string="Units of Measure">
                <group>
                    <group>
                        <field name="name"/>
                        <field name="category_id"/>
                        <field name="uom_type"/>
                        <field name="factor"
                            digits="[42,5]"
                            attrs="{'invisible':[('uom_type','!=','smaller')],
                                    'readonly':[('uom_type','=','bigger')]}"/>
                        <field name="factor_inv"
                            digits="[42,5]"
                            attrs="{'invisible':[('uom_type','!=','bigger')],
                                    'readonly':[('uom_type','!=','bigger')]}"/>
                        <p attrs="{'invisible':[('uom_type','!=','smaller')]}" class="oe_grey" colspan="2">
                            e.g: 1 * (reference unit) = ratio * (this unit)
                        </p>
                        <p attrs="{'invisible':[('uom_type','!=','bigger')]}" class="oe_grey" colspan="2">
                            e.g: 1 * (this unit) = ratio * (reference unit)
                        </p>
                    </group>
                    <group>
                        <field name="active"/>
                        <field name="rounding" digits="[42, 5]"/>
                    </group>
                </group>
            </form>
        </field>
    </record>
    <record id="product_uom_form_action" model="ir.actions.act_window">
        <field name="name">Units of Measure</field>
        <field name="type">ir.actions.act_window</field>
        <field name="res_model">product.uom</field>
        <field name="view_type">form</field>
        <field name="view_id" ref="product_uom_tree_view"/>
        <field name="help" type="html">
          <p class="oe_view_nocontent_create">
            Click to add a new unit of measure.
          </p><p>
            You must define a conversion rate between several Units of
            Measure within the same category.
          </p>
        </field>
    </record>

    <record id="product_uom_categ_form_view" model="ir.ui.view">
        <field name="name">product.uom.categ.form</field>
        <field name="model">product.uom.categ</field>
        <field name="arch" type="xml">
            <form string="Units of Measure categories">
                <group>
                    <field name="name"/>
                </group>
            </form>
        </field>
    </record>
    <record id="product_uom_categ_form_action" model="ir.actions.act_window">
        <field name="name">Unit of Measure Categories</field>
        <field name="type">ir.actions.act_window</field>
        <field name="res_model">product.uom.categ</field>
        <field name="view_type">form</field>
        <field name="view_mode">tree,form</field>
        <field name="help" type="html">
          <p class="oe_view_nocontent_create">
            Click to add a new unit of measure category.
          </p><p>
            Units of measure belonging to the same category can be
            converted between each others. For example, in the category
            <i>'Time'</i>, you will have the following units of measure:
            Hours, Days.
          </p>
        </field>
    </record>
</flectra>