it seems FIX44.xml has less valid values for PartyRole than FIX Spec. It only has 1-9, but spec has 1-38

Identifies the type or role of the PartyID (448) specified.
See "Appendix 6-G - Use of <Parties> Component Block"
Valid values:
1 = Executing Firm (formerly FIX 4.2 ExecBroker)
2 = Broker of Credit (formerly FIX 4.2 BrokerOfCredit)
3 = Client ID (formerly FIX 4.2 ClientID)
4 = Clearing Firm (formerly FIX 4.2 ClearingFirm)
5 = Investor ID
6 = Introducing Firm
7 = Entering Firm
8 = Locate/Lending Firm (for short-sales)
9 = Fund manager Client ID (for CIV)
10 = Settlement Location (formerly FIX 4.2 SettlLocation)
11 = Order Origination Trader (associated with Order Origination Firm - e.g. trader who initiates/submits the order)
12 = Executing Trader (associated with Executing Firm - actually executes)
13 = Order Origination Firm (e.g. buyside firm)
14 = Giveup Clearing Firm (firm to which trade is given up)
15 = Correspondant Clearing Firm
16 = Executing System
17 = Contra Firm
18 = Contra Clearing Firm
19 = Sponsoring Firm
20 = Underlying Contra Firm (...values continued in next row....)
20 = Underlying Contra Firm
21 = Clearing Organization
22 = Exchange
24 = Customer Account
25 = Correspondent Clearing Organization
26 = Correspondent Broker
27 = Buyer/Seller (Receiver/Deliverer)
28 = Custodian
29 = Intermediary
30 = Agent
31 = Sub custodian
32 = Beneficiary
33 = Interested party
34 = Regulatory body
35 = Liquidity provider
36 = Entering Trader
37 = Contra Trader
38 = Position Account
(see Volume 1: "Glossary" for value definitions)