---
title: Filter Elements
description: aliases, allocation_type, count, date_from, date_from_format, date_to, date_to_format, direction, disk_space, epoch, exclude, field, intersect, key, kind,...
url: https://www.elastic.co/docs/reference/elasticsearch/curator/filter_elements
products:
  - Elasticsearch
  - Elasticsearch Curator
---

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

You can use [environment variables](https://www.elastic.co/docs/reference/elasticsearch/curator/envvars) in your configuration files.