BizTalkMgmtDb包含整个Engine中重要Concept的Model。
bts_item表：
1.Meaning
Include all Schema,Map,Pipeline
2.IsPipeline amd SchemaType field
IsPipeline value from {0,1}. Value 1 means that the item is of type Pipeline.
SchemaType value from {0,1,2}. Only one record whose SchemaType value is 2.FullName is System.String(a special message type)
SchemaType value 1 means Property Schema(the other schema type is document schema)
SchemaType value 0 means all document schema and Map.
3.id field refered by bt_MapSpec.itemid field.
bt_MapSpec表：
1.Meaning
All the Map.
2.Important field
indoc_docspec_name and outdoc_docspec_name describe the source and target xsd seperately.
3.itemid field refers to bts_items.txt
bt_DocumentSpec表：
1.Meaning
All the schema
2.Important field
is_property_schema and property_clr_class stand for whether the schema is property schema or document schema.
For document schema,is_property_schema value is 0 and property_clr_class value is NULL.
msgtype is the id for message.
3.itemid refers to bts_item.id field.
bts_assembly表：
All dll
bts_component表：
All the pipeline component
bts_pipeline表：
1.Meaning
All the pipeline(built-in and cutomal)
2.Category field value is of {1,2}. 1 stands for receive pipeline and 2 for send pipeline.
bts_receiveport表：
bts_sendport表：
nvcFilter field describes the filter conditional.
鸡尾虾的壳
