added documentation for JRF provided Trust Service Identity asserter to the README

Author: ddsharpe

README.md

@@ -16,6 +16,7 @@ Many organizations are using WebLogic Server, with or without other Oracle Fusio
     - [Model Names](#model-names)
     - [Model Semantics](#model-semantics)
     - [Modeling Security Providers](site/security_providers.md)
+        - [JRF Trust Service Identity Asserter](site/security_providers.md#trust-service-identity-asserter)
         - [Custom Security Providers](site/security_providers.md#custom-security-providers)
     - [Variable Injection](site/variable_injection.md)
     - [Model Filters](site/tool_filters.md)

site/security_providers.md

@@ -90,6 +90,22 @@ topology:
                         DefaultIdentityAsserter:
 
 ```
+#### Trust Service Identity Asserter
+
+**NOTE:** The Trust Identity Asserter Security Provider is installed by JRF in 12c versions and newer.
+
+The JRF installed Trust Identity Asserter does not supply a schema file by default.  Before you can configure this asserter with WLST offline or WDT offline, you must first build the schema file using the `prepareCustomProvider` script.
+
+Here is an example of how to prepare and install a schema file from its MBean Jar File (MJF): 
+
+```bash
+export CONFIG_JVM_ARGS=-DSchemaTypeSystemName=TrustServiceIdentityAsserter
+
+ORACLE_HOME/oracle_common/common/bin/prepareCustomProvider.sh -mjf=ORACLE_HOME/oracle_common/modules/oracle.jps/jps-wls-trustprovider.jar -out ORACLE_HOME/oracle_common/lib/schematypes/jps-wls-trustprovider.schema.jar
+
+```
+For FMW versions 12.1.2 and 12.1.3, replace `oracle.jps` in the example path above with:
+oracle.jps_12.1.2, or oracle.jps_12.1.3, respectively.
 
 #### Custom Security Providers