Добавил AttributeExternalField в свой код.
Связь между типами создать не получилось.
<?xml version="1.0" encoding="UTF-8"?>
<itop_design xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" version="1.0">
<constants>
</constants>
<classes>
<class id="PowerModule" _delta="define">
<parent>PhysicalDevice</parent>
<properties>
<category>bizmodel,searchable</category>
<abstract>false</abstract>
<key_type>autoincrement</key_type>
<db_table>powermodule</db_table>
<db_key_field>id</db_key_field>
<db_final_class_field/>
<naming>
<format>%1$s</format>
<attributes>
<attribute id="name"/>
</attributes>
</naming>
<display_template/>
<icon>images/PowerModule.png</icon>
<reconciliation>
<attributes>
<attribute id="name"/>
<attribute id="org_id"/>
<attribute id="organization_name"/>
</attributes>
</reconciliation>
</properties>
<methods/>
<presentation>
<details>
<items>
<item id="name">
<rank>10</rank>
</item>
<item id="org_id">
<rank>20</rank>
</item>
<item id="status">
<rank>30</rank>
</item>
<item id="business_criticity">
<rank>40</rank>
</item>
<item id="location_id">
<rank>50</rank>
</item>
<item id="brand_id">
<rank>60</rank>
</item>
<item id="model_id">
<rank>70</rank>
</item>
<item id="serialnumber">
<rank>80</rank>
</item>
<item id="asset_number">
<rank>90</rank>
</item>
<item id="move2production">
<rank>100</rank>
</item>
<item id="purchase_date">
<rank>110</rank>
</item>
<item id="end_of_warranty">
<rank>120</rank>
</item>
<item id="description">
<rank>130</rank>
</item>
<item id="contacts_list">
<rank>140</rank>
</item>
<item id="documents_list">
<rank>150</rank>
</item>
<item id="tickets_list">
<rank>160</rank>
</item>
<item id="providercontracts_list">
<rank>170</rank>
</item>
<item id="services_list">
<rank>180</rank>
</item>
</items>
</details>
<search>
<items>
<item id="name">
<rank>10</rank>
</item>
<item id="org_id">
<rank>20</rank>
</item>
<item id="status">
<rank>30</rank>
</item>
<item id="business_criticity">
<rank>40</rank>
</item>
<item id="location_id">
<rank>50</rank>
</item>
<item id="brand_id">
<rank>60</rank>
</item>
<item id="model_id">
<rank>70</rank>
</item>
<item id="serialnumber">
<rank>80</rank>
</item>
<item id="asset_number">
<rank>90</rank>
</item>
<item id="move2production">
<rank>100</rank>
</item>
<item id="purchase_date">
<rank>110</rank>
</item>
<item id="end_of_warranty">
<rank>120</rank>
</item>
</items>
</search>
<list>
<items>
<item id="org_id">
<rank>10</rank>
</item>
<item id="status">
<rank>20</rank>
</item>
<item id="business_criticity">
<rank>30</rank>
</item>
<item id="location_id">
<rank>40</rank>
</item>
<item id="brand_id">
<rank>50</rank>
</item>
<item id="model_id">
<rank>60</rank>
</item>
<item id="serialnumber">
<rank>70</rank>
</item>
</items>
</list>
</presentation>
</class>
<class id="BatteryModule" _delta="define">
<parent>PhysicalDevice</parent>
<properties>
<category>bizmodel,searchable</category>
<abstract>false</abstract>
<key_type>autoincrement</key_type>
<db_table>batterymodule</db_table>
<db_key_field>id</db_key_field>
<db_final_class_field/>
<naming>
<format>%1$s</format>
<attributes>
<attribute id="name"/>
</attributes>
</naming>
<display_template/>
<icon>images/BatteryModule.png</icon>
<reconciliation>
<attributes>
<attribute id="name"/>
<attribute id="org_id"/>
<attribute id="organization_name"/>
</attributes>
</reconciliation>
</properties>
<methods/>
<presentation>
<details>
<items>
<item id="name">
<rank>10</rank>
</item>
<item id="org_id">
<rank>20</rank>
</item>
<item id="status">
<rank>30</rank>
</item>
<item id="business_criticity">
<rank>40</rank>
</item>
<item id="location_id">
<rank>50</rank>
</item>
<item id="brand_id">
<rank>60</rank>
</item>
<item id="model_id">
<rank>70</rank>
</item>
<item id="serialnumber">
<rank>80</rank>
</item>
<item id="asset_number">
<rank>90</rank>
</item>
<item id="move2production">
<rank>100</rank>
</item>
<item id="purchase_date">
<rank>110</rank>
</item>
<item id="end_of_warranty">
<rank>120</rank>
</item>
<item id="description">
<rank>130</rank>
</item>
<item id="contacts_list">
<rank>140</rank>
</item>
<item id="documents_list">
<rank>150</rank>
</item>
<item id="tickets_list">
<rank>160</rank>
</item>
<item id="providercontracts_list">
<rank>170</rank>
</item>
<item id="services_list">
<rank>180</rank>
</item>
</items>
</details>
<search>
<items>
<item id="name">
<rank>10</rank>
</item>
<item id="org_id">
<rank>20</rank>
</item>
<item id="status">
<rank>30</rank>
</item>
<item id="business_criticity">
<rank>40</rank>
</item>
<item id="location_id">
<rank>50</rank>
</item>
<item id="brand_id">
<rank>60</rank>
</item>
<item id="model_id">
<rank>70</rank>
</item>
<item id="serialnumber">
<rank>80</rank>
</item>
<item id="asset_number">
<rank>90</rank>
</item>
<item id="move2production">
<rank>100</rank>
</item>
<item id="purchase_date">
<rank>110</rank>
</item>
<item id="end_of_warranty">
<rank>120</rank>
</item>
</items>
</search>
<list>
<items>
<item id="org_id">
<rank>10</rank>
</item>
<item id="status">
<rank>20</rank>
</item>
<item id="business_criticity">
<rank>30</rank>
</item>
<item id="location_id">
<rank>40</rank>
</item>
<item id="brand_id">
<rank>50</rank>
</item>
<item id="model_id">
<rank>60</rank>
</item>
<item id="serialnumber">
<rank>70</rank>
</item>
</items>
</list>
</presentation>
</class>
<class id="UPS" _delta="define">
<parent>PhysicalDevice</parent>
<properties>
<category>bizmodel,searchable</category>
<abstract>false</abstract>
<key_type>autoincrement</key_type>
<db_table>ups</db_table>
<db_key_field>id</db_key_field>
<db_final_class_field/>
<naming>
<format>%1$s</format>
<attributes>
<attribute id="name"/>
</attributes>
</naming>
<display_template/>
<icon>images/ups.png</icon>
<reconciliation>
<attributes>
<attribute id="name"/>
<attribute id="org_id"/>
<attribute id="organization_name"/>
</attributes>
</reconciliation>
</properties>
<fields>
<field id="PowerModule" xsi:type="AttributeExternalKey">
<sql>powermodule</sql>
<default_value/>
<is_null_allowed>true</is_null_allowed>
<on_target_delete>DEL_AUTO</on_target_delete>
</field>
<field id="PowerModule" xsi:type="AttributeExternalField">
<extkey_attcode>PowerModule</extkey_attcode>
<target_attcode>PowerModule</target_attcode>
</field>
<field id="BatteryModule" xsi:type="AttributeExternalKey">
<sql>batterymodule</sql>
<default_value/>
<is_null_allowed>true</is_null_allowed>
<on_target_delete>DEL_AUTO</on_target_delete>
</field>
<field id="BatteryModule" xsi:type="AttributeExternalField">
<extkey_attcode>BatteryModule</extkey_attcode>
<target_attcode>BatteryModule</target_attcode>
</field>
</fields>
<methods/>
<presentation>
<details>
<items>
<item id="name">
<rank>10</rank>
</item>
<item id="org_id">
<rank>20</rank>
</item>
<item id="status">
<rank>30</rank>
</item>
<item id="business_criticity">
<rank>40</rank>
</item>
<item id="location_id">
<rank>50</rank>
</item>
<item id="brand_id">
<rank>60</rank>
</item>
<item id="model_id">
<rank>70</rank>
</item>
<item id="PowerModule">
<rank>75</rank>
</item>
<item id="BatteryModule">
<rank>80</rank>
</item>
<item id="serialnumber">
<rank>85</rank>
</item>
<item id="asset_number">
<rank>90</rank>
</item>
<item id="move2production">
<rank>100</rank>
</item>
<item id="purchase_date">
<rank>110</rank>
</item>
<item id="end_of_warranty">
<rank>120</rank>
</item>
<item id="description">
<rank>130</rank>
</item>
<item id="contacts_list">
<rank>140</rank>
</item>
<item id="documents_list">
<rank>150</rank>
</item>
<item id="tickets_list">
<rank>160</rank>
</item>
<item id="providercontracts_list">
<rank>170</rank>
</item>
<item id="services_list">
<rank>180</rank>
</item>
</items>
</details>
<search>
<items>
<item id="name">
<rank>10</rank>
</item>
<item id="org_id">
<rank>20</rank>
</item>
<item id="status">
<rank>30</rank>
</item>
<item id="business_criticity">
<rank>40</rank>
</item>
<item id="location_id">
<rank>50</rank>
</item>
<item id="brand_id">
<rank>60</rank>
</item>
<item id="model_id">
<rank>70</rank>
</item>
<item id="PowerModule">
<rank>75</rank>
</item>
<item id="BatteryModule">
<rank>80</rank>
</item>
<item id="serialnumber">
<rank>85</rank>
</item>
<item id="asset_number">
<rank>90</rank>
</item>
<item id="move2production">
<rank>100</rank>
</item>
<item id="purchase_date">
<rank>110</rank>
</item>
<item id="end_of_warranty">
<rank>120</rank>
</item>
</items>
</search>
<list>
<items>
<item id="org_id">
<rank>10</rank>
</item>
<item id="status">
<rank>20</rank>
</item>
<item id="business_criticity">
<rank>30</rank>
</item>
<item id="location_id">
<rank>40</rank>
</item>
<item id="brand_id">
<rank>50</rank>
</item>
<item id="model_id">
<rank>60</rank>
</item>
<item id="serialnumber">
<rank>70</rank>
</item>
</items>
</list>
</presentation>
</class>
</classes>
<menus>
<menu id="ConfigManagementOverview" xsi:type="DashboardMenuNode" _delta="must_exist">
<definition>
<cells>
<cell id="0" _delta="must_exist">
<dashlets>
<dashlet id="112" xsi:type="DashletBadge" _delta="define">
<rank>11</rank>
<class>PowerModule</class>
</dashlet>
</dashlets>
</cell>
</cells>
</definition>
</menu>
<menu id="ConfigManagementOverview" xsi:type="DashboardMenuNode" _delta="must_exist">
<definition>
<cells>
<cell id="0" _delta="must_exist">
<dashlets>
<dashlet id="113" xsi:type="DashletBadge" _delta="define">
<rank>12</rank>
<class>BatteryModule</class>
</dashlet>
</dashlets>
</cell>
</cells>
</definition>
</menu>
<menu id="ConfigManagementOverview" xsi:type="DashboardMenuNode" _delta="must_exist">
<definition>
<cells>
<cell id="0" _delta="must_exist">
<dashlets>
<dashlet id="114" xsi:type="DashletBadge" _delta="define">
<rank>13</rank>
<class>UPS</class>
</dashlet>
</dashlets>
</cell>
</cells>
</definition>
</menu>
</menus>
<profiles>
</profiles>
</itop_design>