When you create a content type, you can define if your fields will be shown in DisplayForm, EditForm, NewForm. You can hide or show them, just as Yaroslav Pentsarsky says. If your list is already provisioned, you can change them with Server Object Model, why not in PowerShell: Technet: Setting ShowInDisplayForm, ShowInEditForm, ShowInNewForm properties with powershell. If you don’t have access to the server, then the same can be done with JSOM. Here is the code:

After debugging I have found the Content Type Ids for Image, Audio and Video in the assets library. These content type ids are not present in SPBuiltInContentTypeId.

public class SPBuiltInContentTypeIdExtension
{
  public static SPContentTypeId Video =
    new SPContentTypeId
     ("0x0101009148F5A04DDD49CBA7127AADA5FB792B00291D173ECE694D56B19D111489C4369D");
  public static SPContentTypeId Audio =
    new SPContentTypeId
      ("0x0101009148F5A04DDD49CBA7127AADA5FB792B006973ACD696DC4858A76371B2FB2F439A");
  public static SPContentTypeId Image =
    new SPContentTypeId
      ("0x0101009148F5A04DDD49CBA7127AADA5FB792B00AADE34325A8B49CDA8BB4DB53328F214");
}

These three asset content types inherit from Document CT (“0x0101”) and have “0x0101009148F5A04DDD49CBA7127AADA5FB792B” in common, which is the content type id for multimedia content type. So if you want to check if it is a multimedia, use this id. You can see the content type id when you go to Site Actions - Site Settings - Content Types. Click on a content type you interested in. In the address bar of your browser find ?ctype=.

På microsoft.com finns en ny videokurs om web content management. Där kan du lära dig om hur man implementerar cms-funktionalitet med sharepoint, bl.a.: content types, page layouts med mera. Tack för tipset, deutschsprachige Sharepoint-Community.

Det är enkelt att lägga till kolumnen företagsnyckelord. Skapa egen contenttype och lägg till fieldref.

<FieldRef ID="{23f27201-bee3-471e-b2e7-b64fd8b7ca38}"/>

Funkar utmärkt t.ex. om du ärver ContentTypen från Announcements. Lite svårare är det med Dokument. I själva verket läggs till fler kolumner för att det ska fungera. I Announcements finns de redan. Men i dokument måste du lägga till dem extra:

<!-- Enterprise Keywords-->
<FieldRef ID="{23f27201-bee3-471e-b2e7-b64fd8b7ca38}"/>
<!-- in order keywords to work, two additional fields have to be created-->
<!-- TaxKeywordTaxHTField  -->
<FieldRef ID="{1390a86a-23da-45f0-8efe-ef36edadfb39}"/>
<!-- TaxCatchAll -->
<FieldRef ID="{f3b0adf9-c1a2-4b02-920d-943fba4b3611}"/>

Utan TaxKeywordTaxHTField uppstår fel av typen: “Kan inte hämta värdet från kolumnen {00000000…}”.