Difference between revisions of "Text field"
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| + | {{fieldtypes}} | ||
| + | __NOTOC__ | ||
| + | == Inheritance == | ||
| + | |||
* [[Metadata]] | * [[Metadata]] | ||
** [[Text field]] | ** [[Text field]] | ||
== Description == | == Description == | ||
| + | |||
| + | This is a very simple type of metadata field, which is used as a basis for several others. | ||
| + | |||
| + | It stores a string of text. The maximum possible length of the string is 255 bytes. | ||
| + | |||
| + | Note that 255 bytes does not mean 255 characters! UTF-8 can use 1 to 4 bytes to store a character. ASCII characters (a-z,0-9 etc) only use 1 byte so it will store 255 ASCII characters, but less of latin and much less of chinese. | ||
== Properties == | == Properties == | ||
| Line 9: | Line 19: | ||
| name || default || description | | name || default || description | ||
|- | |- | ||
| − | | '''sql_index''' || 0 || ''as for [[Metadata]] but with a different default.'' | + | | '''sql_index''' || 0 || ''as for [[Metadata]] but with a different default.'' |
|- | |- | ||
| − | | '''text_index''' || 1 || ''as for [[Metadata]] but with a different default.'' | + | | '''text_index''' || 1 || ''as for [[Metadata]] but with a different default.'' |
|} | |} | ||
== Required Phrases == | == Required Phrases == | ||
| + | |||
| + | None | ||
| + | |||
| + | == Database == | ||
| + | |||
| + | Text fields are stored in the database as | ||
| + | |||
| + | fieldname VARCHAR(255) | ||
Revision as of 15:24, 11 January 2007
EPrints 3 Reference: Directory Structure - Metadata Fields - Repository Configuration - XML Config Files - XML Export Format - EPrints data structure - Core API - Data Objects
Metadata Fields: Arclanguage - Base64 - Bigint - Boolean - Compound - Counter - Dataobjref - Date - Decimal - Email - Fields - Float - Id - Idci - Image - Int - Itemref - Keywords - Langid - Longtext - Longtext_counter - Multilang - Multipart - Name - Namedset - Pagerange - Recaptcha - Relation - Search - Secret - Set - Storable - Subject - Subobject - Text - Time - Timestamp - Url - Uuid
Inheritance
Description
This is a very simple type of metadata field, which is used as a basis for several others.
It stores a string of text. The maximum possible length of the string is 255 bytes.
Note that 255 bytes does not mean 255 characters! UTF-8 can use 1 to 4 bytes to store a character. ASCII characters (a-z,0-9 etc) only use 1 byte so it will store 255 ASCII characters, but less of latin and much less of chinese.
Properties
| name | default | description |
| sql_index | 0 | as for Metadata but with a different default. |
| text_index | 1 | as for Metadata but with a different default. |
Required Phrases
None
Database
Text fields are stored in the database as
fieldname VARCHAR(255)
