The general layout of the Declaration of Conformity can be found in this document (taken from standard ISO / IEC 17050-1:2005): Declaration of Conformity
Examples of Declaration Of Conformity (DoC):
Example of Declaration of Conformity for computer equipment according to EMC and LVD directive is here.
Example of Declaration of Conformity for computer equipment containing NFC module according to EMC, LVD, R&TTe directive is here.
Example of Declaration of Conformity for tools according to EMC and MD directive is here.