---
mapped_pages:
  - https://www.elastic.co/guide/en/elasticsearch/client/curator/current/filter_elements.html
---

# Filter Elements [filter_elements]

* [aliases](/reference/fe_aliases.md)
* [allocation_type](/reference/fe_allocation_type.md)
* [count](/reference/fe_count.md)
* [date_from](/reference/fe_date_from.md)
* [date_from_format](/reference/fe_date_from_format.md)
* [date_to](/reference/fe_date_to.md)
* [date_to_format](/reference/fe_date_to_format.md)
* [direction](/reference/fe_direction.md)
* [disk_space](/reference/fe_disk_space.md)
* [epoch](/reference/fe_epoch.md)
* [exclude](/reference/fe_exclude.md)
* [field](/reference/fe_field.md)
* [intersect](/reference/fe_intersect.md)
* [key](/reference/fe_key.md)
* [kind](/reference/fe_kind.md)
* [max_num_segments](/reference/fe_max_num_segments.md)
* [pattern](/reference/fe_pattern.md)
* [period_type](/reference/fe_period_type.md)
* [range_from](/reference/fe_range_from.md)
* [range_to](/reference/fe_range_to.md)
* [reverse](/reference/fe_reverse.md)
* [source](/reference/fe_source.md)
* [state](/reference/fe_state.md)
* [stats_result](/reference/fe_stats_result.md)
* [timestring](/reference/fe_timestring.md)
* [threshold_behavior](/reference/fe_threshold_behavior.md)
* [unit](/reference/fe_unit.md)
* [unit_count](/reference/fe_unit_count.md)
* [unit_count_pattern](/reference/fe_unit_count_pattern.md)
* [use_age](/reference/fe_use_age.md)
* [value](/reference/fe_value.md)
* [week_starts_on](/reference/fe_week_starts_on.md)

You can use [environment variables](/reference/envvars.md) in your configuration files.

