> For the complete documentation index, see [llms.txt](https://docs.pentaho.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.pentaho.com/install/10.2-install/multidimensional-data-modeling-in-pentaho/about-multidimensional-expression-language/mondrian-schema-element-reference/aggtable/constituent-elements.md).

# Constituent Elements

| Element                                                                                                                                                                            | Definition                                                                                     |
| ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- | ---------------------------------------------------------------------------------------------- |
| [AggFactCount](/install/10.2-install/multidimensional-data-modeling-in-pentaho/about-multidimensional-expression-language/mondrian-schema-element-reference/aggfactcount.md)       | Describes what the fact\_count column looks like.                                              |
| [AggIgnoreColumn](/install/10.2-install/multidimensional-data-modeling-in-pentaho/about-multidimensional-expression-language/mondrian-schema-element-reference/aggignorecolumn.md) | Tells Mondrian to ignore a column in an aggregate table.                                       |
| [AggForeignKey](/install/10.2-install/multidimensional-data-modeling-in-pentaho/about-multidimensional-expression-language/mondrian-schema-element-reference/aggforeignkey.md)     | Maps a foreign key in the fact table to a foreign key column in the candidate aggregate table. |
| [AggMeasure](/install/10.2-install/multidimensional-data-modeling-in-pentaho/about-multidimensional-expression-language/mondrian-schema-element-reference/aggmeasure.md)           | Maps a measure to a column in the candidate aggregate table.                                   |
| [AggLevel](/install/10.2-install/multidimensional-data-modeling-in-pentaho/about-multidimensional-expression-language/mondrian-schema-element-reference/agglevel.md)               | Maps a level to a column in the candidate aggregate table.                                     |


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