In Modx, it is possible to choose the type of input field when creating tv-parameters: picture, number, text and others. I noticed that some additional packages put their input fields. But I still do not understand how it is possible to create my own customized input fields in the system. Enlighten?
in MIME-type it is very easy to google for your type (for example xls mime or content type xls)
But one subtlety, if you specify the type of binary - for some reason the file is not downloaded when you create a document of your type. It is necessary for everyone to remove the daw of the binari. When you create a document you put on the settings tab - Content Disposition: attachment and choose your created type. Then it will be downloaded.