Pillar #1:

xyz:
  abc:
    - name: Item #1
      key1: value1
      key2: value2

Pillar #2:

xyz:
  abc:
    - name: Item #2
      key1: value4
      key2: value9

Pillar top.sls:

base:
  'ec2_tags:service:applicaion1'
    - match: grain
    - pillar1
  'ec2_tags:support_services:applicaion2'
    - match: grain
    - pillar2

On Target Instance with both tags:
salt-call pillar.get xyz
xyz:
  abc:
    - name: Item #1
      key1: value1
      key2: value2
    - name: Item #2
      key1: value4
      key2: value9