Processing Instruction asset_data

Upalod templates in media categories use a processing instruction (PI) named asset_data. The<?imperia asset_data?>` PI has various functions, primarily generating specialized input fields or text areas extended for file metadata usage.

For example, an input field to enter the file title:

 <?imperia asset_data
    name: title
    label: Titel
    source: *:headline,*:title,EXIF:XPTitle,IPTC:ObjectName
    hint: Unter diesem Titel finden Sie das Bild im CMS wieder
    required: 0
    set: EXIF:XPTitle,IPTC:ObjectName
  ?>

The source option searches the specified field names in different metadata formats, such as EXIF, XMP, or IPTC, and provides the results to the input field. The syntax *:fieldname means that all available metadata formats are searched. Alternatively, you can explicitly specify a format (e.g., iptc:fieldname).

The table below provides a description of the available options:

Option	Description	Example
source	Retrieves the metadata list and makes the results available to the input field.	source: IPTC:ObjectName
name	Specifies the meta-info variable where the entered value will be stored.	name: title
label	Specifies the label of the input field or textarea.	label: Titel
hint	Specifies the help text displayed below the input field or textarea.	hint: Unter diesem Namen finden Sie diese Datei im CMS
no_autofill	Prevents automatic prefilling of content from image metadata.	no_autofill: 1
set	Writes the input values back to the asset metadata using this parameter.	set: EXIF:XPTitle
required	Determines whether the field must be filled out to complete the upload.	required:1