> For the complete documentation index, see [llms.txt](https://1spatial.gitbook.io/fme-form-beginner/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://1spatial.gitbook.io/fme-form-beginner/transformer-usage/transformer-usage-review.md).

# Transformer Usage - Module Review

This module was designed to introduce you to a broader range of FME transformers, plus techniques for applying transformers more efficiently.

## What You Should Have Learned from this Module

The following are key points to be learned from this session:

### Theory

* There are distinct groups of transformers that do work other than transforming data attributes or geometry
* FeatureReader and FeatureWriter transformers read and write data at any point in a workspace
* Integrated editing dialogs allow the author to replace transformers with built-in functions
* A large proportion of the most-used transformers are related to attribute-handling
* Filtering is the act of dividing data. Conditional filtering is the act of dividing data using a test or condition
* Data joins are carried out by transformers that merge data, from within Workbench or from external data sources

### FME Skills

The ability to locate a transformer to carry out a particular task, without knowing about that transformer in advance

* The ability to use FeatureReader and FeatureWriter transformers
* The ability to read data from and write data to, web services
* The ability to build strings and calculate arithmetic values using integrated tools
* The ability to use common transformers for attribute management
* The ability to use transformers for filtering and dividing data
* The ability to use transformers for merging data together.


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