The classification portion of the security field shall be a non-empty string.

Consider an <Access> instance A.

• If A's access_constraints is set to SE_RESTR_CODE_OTHER_RESTRICTIONS. A's other_constraints field shall contain a non-empty string specifying what those other restrictions are.
• If A's use_constraints is set to SE_RESTR_CODE_OTHER_RESTRICTIONS. A's other_constraints field shall contain a non-empty string specifying what those other restrictions are.

name shall be a non-empty string

media_urn shall be a non-empty string in the form of a valid URN

abstract shall be a non-empty string

An instance of <Description> that is a component of a <Transmittal Root> shall have at least one <Keywords> component.

All the <Keywords> components of a given object instance shall have distinct type codes. Within a given <Keywords> instance, the entries of the keyword_array shall be distinct.

An instance of <Lineage> shall specify at least one of the following:

• a <Process Step>,
• a <Source>, or
• a non-empty string within its statement field.

email_address shall be a non-empty string (still complies with existing constraint that it's a syntactically valid email address)

(still complies with the existing constraint that the web_site, now the online_resource's location, shall specify a syntactically valid URL)

The locale of each SE_String field shall be specified using the same country code as that used by the address, except that email_address entries shall be syntactically valid email addresses (with locales set accordingly).

At least one of the following fields shall contain a non-empty string: individual_name, position_name, or organization_name.

Given an instance P of <Process Step>, the following conditions shall hold.

• P's description field shall be a non-empty string.
• P's <Absolute Time> component shall have time_significance = SE_TIME_SIGNIF_OCCURRENCE.
• If P has <Responsible Party> components, each shall specify SE_RESP_PTY_RL_CODE_PROCESSOR as its role.

• For an instance P of <Process Step>, P's description field is required to be non-empty so that the event is at least minimally described by its representation P.
• P's <Absolute Time> component represents the time at which the event represented by P occurred, so its time_significance's semantic meaning is that corresponding to SE_TIME_SIGNIF_OCCURRENCE.