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• dc-schema (Required) : Name of metadata schema employed, e.g. dc for Dublin Core. This value must match the value of the schema element defined in dublin-core-types.xml
• dc-element (Required) : Name of the Dublin Core element entered in this field, e.g. contributor.
• dc-qualifier: Qualifier of the Dublin Core element entered in this field, e.g. when the field is contributor.advisor the value of this element would be advisor. Leaving this out means the input is for an unqualified DC element.
• language:  If set to true a drop down menu will be shown, containing languages. The selected language will be used as language tag of the metadata field. A compulsory argument value-pairs-name must be given containing the name of the value pair that contains all the languages: e.g. <language value-pairs-name="common_iso_languages">true</language>. 
• repeatable: Value is true when multiple values of this field are allowed, false otherwise. When you mark a field repeatable, the UI will add an "Add more" control to the field, allowing the user to ask for more fields to enter additional values. Intended to be used for arbitrarily-repeating fields such as subject keywords, when it is impossible to know in advance how many input boxes to provide.  Repeatable fields also support reordering of values.
• label (Required): Text to display as the label of this field, describing what to enter, e.g. "Your Advisor's Name".
• input-type (Required): Defines the kind of interactive widget to put in the form to collect the Dublin Core value. Content must be one of the following keywords:
  
  • onebox – A single text-entry box (i.e. a normal input textbox)
  • textarea – Large block of text that can be entered on multiple lines, e.g. for an abstract.
  • name – Personal name, with separate fields for family name and first name. When saved they are appended in the format 'LastName, FirstName'.  (By default, this input type is unused. Author fields now use the "onebox" type to support different types of names.)
  • date – Calendar date. When required, demands that at least the year be entered.
  • series – Series/Report name and number. Separate fields are provided for series name and series number, but they are appended (with a semicolon between) when saved.
  • dropdown – Choose value(s) from a "drop-down" menu list. Note: You must also include a value for the value-pairs-name attribute to specify a list of menu entries from which to choose. Use this to make a choice from a restricted set of options, such as for the language item.
  • qualdrop_value – Enter a "qualified value", which includes both a qualifier from a drop-down menu and a free-text value. Used to enter items like alternate identifiers and codes for a submitted item, e.g. the DC identifier field. Note: As for the dropdown type, you must include the value-pairs-name attribute to specify a menu choice list.
  • list – Choose value(s) from a checkbox or radio button list. If the repeatable attribute is set to true, a list of checkboxes is displayed. If the repeatable attribute is set to false, a list of radio buttons is displayed. Note: You must also include a value for the value-pairs-name attribute to specify a list of values from which to choose. (By default, this input type is unused.)
  • tag - A free-text field which allows you to add multiple labels/tags as values. An example is the "Subject Keywords" field. Note: A tag field MUST be marked as repeatable.
• hint (Required): Content is the text that will appear as a "hint", or instructions, below the input field. Can be left empty, but the tag must be present.
• required: When this element is included with any content, it marks the field as a required input. If the user saves the form without entering a value for this field, that text is displayed as a warning message. For example, <required>You must enter a title.</required> Note that leaving the required element empty will not mark a field as required, e.g.:<required></required>
• vocabulary: When specified, this field uses a controlled vocabulary defined in [dspace]/config/controlled-vocabularies/[name].xml. This setting may be used to provide auto-complete functionality, for example in the "Subject Keywords" field (which uses the "tag" input type).  See also the "Configuring Controlled Vocabularies" section below.
• regex: When specified, this field will be validated against the Regular Expression, and only successfully validating values will be saved.  An example is commented out in the default "Author" field.
• style: When specified, this provides a CSS style recommendation to the UI for how to style that field. This is primarily used when displaying multiple fields per row, so that you can tell the UI how many columns each field should use in that row.  Keep in mind, these styles should follow the Bootstrap Grid System, where the number of columns adds up to 12.  An example can be see in the default "Date of Issue" and "Publisher" fields, which are configured to use 4 (col-sm-4) and 8 (col-sm-8) columns respectively.
• visibility: the submission scope for which the field should be visible. Values allowed are submission or workflow. When one of the two options is given the filed will be visible only for the scope provided and it will be hidden otherwise.
• readonly: this option can be used only together with the visibility element, and it means the field should be a read-only input instead of being hidden out of the scope provided by the visibility element. The value allowed id is readonly, e.g.: <readonly>readonly</readonly>

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