# Illegal characters in elasticsearch field names **URL:** \ **Category:** Elasticsearch\ **Created:** [April 25, 2014, 11:42am UTC](https://discuss.elastic.co/t/illegal-characters-in-elasticsearch-field-names/17196 "2014-04-25T11:42:30Z")\ **Posts on this page:** 4\ **Page:** 1
**Author:** ![Eliezer\_Shindler](https://avatars.discourse-cdn.com/v4/letter/e/5fc32e/32.png) [@Eliezer\_Shindler](https://discuss.elastic.co/u/Eliezer_Shindler)\ **Post date:** [April 25, 2014, 11:42am UTC](https://discuss.elastic.co/t/illegal-characters-in-elasticsearch-field-names/17196/1 "2014-04-25T11:42:30Z")
Hi, Besides from special characters, elasticsearch also does not seem to allow other characters in fild names, such as \<,\> and a comma. Could anyone please provide me with a full list of illegal characters for field names. Many thanks, Eli -- You received this message because you are subscribed to the Google Groups "elasticsearch" group. To unsubscribe from this group and stop receiving emails from it, send an email to [elasticsearch+unsubscribe@googlegroups.com](mailto:elasticsearch+unsubscribe@googlegroups.com). To view this discussion on the web visit [https://groups.google.com/d/msgid/elasticsearch/b113635c-3b53-4ba7-9bd2-4ca554737282%40googlegroups.com](https://groups.google.com/d/msgid/elasticsearch/b113635c-3b53-4ba7-9bd2-4ca554737282%40googlegroups.com). For more options, visit [https://groups.google.com/d/optout](https://groups.google.com/d/optout). ---
**Author:** ![jprante](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/jprante/32/44941_2.png) [@jprante](https://discuss.elastic.co/u/jprante)\ **Post date:** [April 25, 2014, 12:56pm UTC](https://discuss.elastic.co/t/illegal-characters-in-elasticsearch-field-names/17196/2 "2014-04-25T12:56:19Z")
Special characters in Elasticsearch field names are: . (for navigation between name components) # (for delimiting name components in \_uid, should work, but is discouraged) - (for matching names) There are also some restrictions on type names for mappings: - must not start with underscore "\_" - must not contain comma "," - must not contain hash mark "#" - usage of point "." is discouraged but possible Jörg On Fri, Apr 25, 2014 at 1:42 PM, Eliezer Shindler \<[eliezershindler@gmail.com](mailto:eliezershindler@gmail.com) > wrote: > Hi, > > Besides from special characters, elasticsearch also does not seem to allow > other characters in fild names, such as \<,\> and a comma. Could anyone > please provide me with a full list of illegal characters for field names. > > Many thanks, > > Eli > > -- > You received this message because you are subscribed to the Google Groups > "elasticsearch" group. > To unsubscribe from this group and stop receiving emails from it, send an > email to [elasticsearch+unsubscribe@googlegroups.com](mailto:elasticsearch+unsubscribe@googlegroups.com). > To view this discussion on the web visit > [https://groups.google.com/d/msgid/elasticsearch/b113635c-3b53-4ba7-9bd2-4ca554737282%40googlegroups.com](https://groups.google.com/d/msgid/elasticsearch/b113635c-3b53-4ba7-9bd2-4ca554737282%40googlegroups.com)[https://groups.google.com/d/msgid/elasticsearch/b113635c-3b53-4ba7-9bd2-4ca554737282%40googlegroups.com?utm\_medium=email&utm\_source=footer](https://groups.google.com/d/msgid/elasticsearch/b113635c-3b53-4ba7-9bd2-4ca554737282%40googlegroups.com?utm_medium=email&utm_source=footer) > . > For more options, visit [https://groups.google.com/d/optout](https://groups.google.com/d/optout). -- You received this message because you are subscribed to the Google Groups "elasticsearch" group. To unsubscribe from this group and stop receiving emails from it, send an email to [elasticsearch+unsubscribe@googlegroups.com](mailto:elasticsearch+unsubscribe@googlegroups.com). To view this discussion on the web visit [https://groups.google.com/d/msgid/elasticsearch/CAKdsXoHbWGfCCNbq\_vUA7EDTNs-2%3DsnbqVVs89mHD0c9YF6NQg%40mail.gmail.com](https://groups.google.com/d/msgid/elasticsearch/CAKdsXoHbWGfCCNbq_vUA7EDTNs-2%3DsnbqVVs89mHD0c9YF6NQg%40mail.gmail.com). For more options, visit [https://groups.google.com/d/optout](https://groups.google.com/d/optout). ---
**Author:** ![Eliezer\_Shindler](https://avatars.discourse-cdn.com/v4/letter/e/5fc32e/32.png) [@Eliezer\_Shindler](https://discuss.elastic.co/u/Eliezer_Shindler)\ **Post date:** [April 25, 2014, 2:46pm UTC](https://discuss.elastic.co/t/illegal-characters-in-elasticsearch-field-names/17196/3 "2014-04-25T14:46:54Z")
Thank you. On Friday, 25 April 2014 13:56:19 UTC+1, Jörg Prante wrote: > Special characters in Elasticsearch field names are: > > . (for navigation between name components) > > # (for delimiting name components in \_uid, should work, but is discouraged) > > - (for matching names) > > There are also some restrictions on type names for mappings: > > - must not start with underscore "\_" > - must not contain comma "," > - must not contain hash mark "#" > - usage of point "." is discouraged but possible > > Jörg > > On Fri, Apr 25, 2014 at 1:42 PM, Eliezer Shindler \<[eliezer...@gmail.com](mailto:eliezer...@gmail.com)\ > > > wrote: > > > Hi, > > > > Besides from special characters, elasticsearch also does not seem to > > allow other characters in fild names, such as \<,\> and a comma. Could anyone > > please provide me with a full list of illegal characters for field names. > > > > Many thanks, > > > > Eli > > > > -- > > You received this message because you are subscribed to the Google Groups > > "elasticsearch" group. > > To unsubscribe from this group and stop receiving emails from it, send an > > email to [elasticsearc...@googlegroups.com](mailto:elasticsearc...@googlegroups.com) \. > > To view this discussion on the web visit > > [https://groups.google.com/d/msgid/elasticsearch/b113635c-3b53-4ba7-9bd2-4ca554737282%40googlegroups.com](https://groups.google.com/d/msgid/elasticsearch/b113635c-3b53-4ba7-9bd2-4ca554737282%40googlegroups.com)[https://groups.google.com/d/msgid/elasticsearch/b113635c-3b53-4ba7-9bd2-4ca554737282%40googlegroups.com?utm\_medium=email&utm\_source=footer](https://groups.google.com/d/msgid/elasticsearch/b113635c-3b53-4ba7-9bd2-4ca554737282%40googlegroups.com?utm_medium=email&utm_source=footer) > > . > > For more options, visit [https://groups.google.com/d/optout](https://groups.google.com/d/optout). -- You received this message because you are subscribed to the Google Groups "elasticsearch" group. To unsubscribe from this group and stop receiving emails from it, send an email to [elasticsearch+unsubscribe@googlegroups.com](mailto:elasticsearch+unsubscribe@googlegroups.com). To view this discussion on the web visit [https://groups.google.com/d/msgid/elasticsearch/efe1550c-2888-49c2-b85d-1abb1f45016c%40googlegroups.com](https://groups.google.com/d/msgid/elasticsearch/efe1550c-2888-49c2-b85d-1abb1f45016c%40googlegroups.com). For more options, visit [https://groups.google.com/d/optout](https://groups.google.com/d/optout). ---
**Author:** ![system](https://us1.discourse-cdn.com/elastic/original/3X/1/a/1ac57faf039f6b580b3f104ef42a2a89e41014de.png) [@system](https://discuss.elastic.co/u/system)\ **Post date:** [July 6, 2017, 1:33am UTC](https://discuss.elastic.co/t/illegal-characters-in-elasticsearch-field-names/17196/4 "2017-07-06T01:33:30Z")