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DMSCHEMA_MINING_MODEL_CONTENT Rowset

Allows the client application to browse the content of a data mining model. Client applications can use the special tree operation restrictions described at the end of this topic to navigate the content of the mining model.

The DMSCHEMA_MINING_MODEL_CONTENT rowset contains the following columns.

Column name

Type indicator

Length

Description

MODEL_CATALOG

DBTYPE_WSTR

The catalog name. Microsoft SQL Server Analysis Services populates this column with the name of the database of which the model is a member.

MODEL_SCHEMA

DBTYPE_WSTR

The unqualified schema name. This column is not supported by Analysis Services; it always contains VT_NULL.

MODEL_NAME

DBTYPE_WSTR

The name of the model with which the content described by this row is associated.

ATTRIBUTE_NAME

DBTYPE_WSTR

The names of the attributes that correspond to this node.

NODE_NAME

DBTYPE_WSTR

The name of the node. Currently, this column contains the same value as NODE_UNIQUE_NAME, though this may change in future releases.

NODE_UNIQUE_NAME

DBTYPE_WSTR

The unique name of the node.

NODE_TYPE

DBTYPE_I4

The type of the node. Will generate one of the following values (3rd party data mining algorithms can extend this list):

  • DM_NODE_TYPE_CLASSIFICATION_TREE_ROOT (2)

  • DM_NODE_TYPE_TREE_INTERIOR (3)

  • DM_NODE_TYPE_TREE_DISTRIBUTION (4)

  • DM_NODE_TYPE_CLUSTER (5)

  • DM_NODE_TYPE_UNKNOWN (6)

  • DM_NODE_TYPE_ITEMSET (7)

  • DM_NODE_TYPE_ASSOCIATION_RULE (8)

  • DM_NODE_TYPE_NB_PREDICTABLE_ATTRIBUTE (9)

  • DM_NODE_TYPE_NB_INPUT_ATTRIBUTE (10)

  • DM_NODE_TYPE_NB_INPUT_ATTRIBUTE_STATE (11)

  • DM_NODE_TYPE_SEQUENCE (13)

  • DM_NODE_TYPE_TRANSITION (14)

  • DM_NODE_TYPE_TIME_SERIES (15)

  • DM_NODE_TYPE_TS_TREE (16)

  • DM_NODE_TYPE_NN_SUBNETWORK (17)  Neural network, subnetwork

  • DM_NODE_TYPE_NN_INPUT_LAYER (18)  Neural network, input layer (parent of input nodes)

  • DM_NODE_TYPE_NN_HIDDEN_LAYER (19) Neural network, hidden layer (parent of hidden nodes)

  • DM_NODE_TYPE_NN_OUTPUT_LAYER (20) Neural network, output layer (parent of output nodes)

  • DM_NODE_TYPE_NN_INPUT_NODE (21) Neural network, input node

  • DM_NODE_TYPE_NN_HIDDEN_NODE (22) Neural network, hidden node

  • DM_NODE_TYPE_NN_OUTPUT_NODE (23) Neural network, output node

  • DM_NODE_TYPE_NN_MARGINAL_STAT_NODE (24) Neural network, marginal stat node

  • DM_NODE_TYPE_REGRESSION_TREE_ROOT (25)

  • DM_NODE_TYPE_NB_MARGINAL_STAT_NODE (26) Neural network, marginal stat node

NODE_GUID

DBTYPE_GUID

The node GUID. This column is not supported by Analysis Services; it always contains NULL.

NODE_CAPTION

DBTYPE_WSTR

A label or a caption associated with the node. This property is primarily for display purposes.

CHILDREN_CARDINALITY

DBTYPE_UI4

An estimate of the number of children that the node has.

PARENT_UNIQUE_NAME

DBTYPE_WSTR

The unique name of the node's parent. NULL is returned for any nodes at the root level.

NODE_DESCRIPTION

DBTYPE_WSTR

A user-friendly description of the node.

NODE_RULE

DBTYPE_WSTR

An XML description of the rule that is embedded in the node.

MARGINAL_RULE

DBTYPE_WSTR

An XML description of the rule that is moving to the node from the parent node.

NODE_PROBABILITY

DBTYPE_R8

The probability associated with this node.

MARGINAL_PROBABILITY

DBTYPE_R8

The probability of reaching the node from the parent node.

NODE_DISTRIBUTION

DBTYPE_HCHAPTER

A table that contains the probability histogram of the node.

NODE_SUPPORT

DBTYPE_R8

The number of cases that support this node.

MSOLAP_MODEL_COLUMN

DBTYPE_WSTR

The name of the column from the model definition to which this node pertains.

MSOLAP_NODE_SCORE

DBTYPE_R8

The score that was computed for this node.

MSOLAP_NODE_SHORT_CAPTION

DBTYPE_WSTR

A short caption for the node that can be used for display purposes to improve readability.

The DMSCHEMA_MINING_MODEL_CONTENT rowset can be restricted on the columns listed in the following table.

Column name

Type indicator

Restriction State

MODEL_CATALOG

DBTYPE_WSTR

Optional.

MODEL_SCHEMA

DBTYPE_WSTR

Optional.

MODEL_NAME

DBTYPE_WSTR

Optional.

ATTRIBUTE_NAME

DBTYPE_WSTR

Optional.

NODE_NAME

DBTYPE_WSTR

Optional.

NODE_UNIQUE_NAME

DBTYPE_WSTR

Optional.

NODE_TYPE

DBTYPE_I4

Optional.

NODE_GUID

DBTYPE_WSTR

Optional.

NODE_CAPTION

DBTYPE_WSTR

Optional.

TREE_OPERATION

DBTYPE_UI4

Optional. See below for additional remarks.

The restriction, TREE_OPERATION, is not on any particular column of the DMSCHEMA_MINING_MODEL_CONTENT rowset; rather, it specifies a tree operator. The consumer can specify a NODE_UNIQUE_NAME restriction and the tree operator (ANCESTORS, CHILDREN, SIBLINGS, PARENT, DESCENDANTS, SELF) to obtain the requested set of members. The SELF operator includes the row for the node itself in the list of returned rows. The following table describes the constants that make up the bitmap definition for the TREE_OPERATION restriction. They can be combined using the logical OR operator.

Constant

Value

DMTREEOP_ANCESTORS

0x00000020

DMTREEOP_CHILDREN

0x00000001

DMTREEOP_SIBLINGS

0x00000002

DMTREEOP_PARENT

0x00000004

DMTREEOP_SELF

0x00000008

DMTREEOP_DESCENDANTS

0x00000010

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