1. Retail Market: User Interaction & Data Delivery in Nodal

2. Slide 2 Legal Disclaimers and Admonitions Protocol Disclaimer This presentation provides a general overview of the Texas Nodal Market Implementation and is not intended to be a substitute for the ERCOT Nodal Protocols, as amended from time to time. If any conflict exists between this presentation and the ERCOT Nodal Protocols, the ERCOT Nodal Protocols shall control in all respects. For more information, please visit: http://nodal.ercot.com/protocols/index.html

3. Slide 3 Legal Disclaimers and Admonitions Antitrust Admonition ERCOT strictly prohibits market participants and their employees who are participating in ERCOT activities from using their participation in ERCOT activities as a forum for engaging in practices or communications that violate antitrust laws. The ERCOT Board has approved guidelines for Members of ERCOT Committees, subcommittees and working groups to be reviewed and followed by each market participant attending ERCOT meetings. For details, please review the guidelines in the attachments tab of this presentation.

4. Slide 4 Target Audience This course is intended for the ERCOT Retail Market and is directed towards those Retail Market Participants (MPs) currently using Texas Market Link (TML) and will be utilizing the Market Information System (MIS). This informational presentation provides MPs with a basic understanding of the layout of the MIS and the differences between today’s TML and tomorrow’s MIS. In addition, detailed information in regards to retail data postings on TML and MIS will be covered at the extract and report level. MIS and extract and report questions between now and go-live should be submitted to MarketTrials@ercot.com or addressed on the Friday Market Trials Market Call scheduled on the ERCOT calendar.MarketTrials@ercot.com MIS and extract and report questions after Nodal go-live should be directed to your Retail Account Manager. ERCOT Market Information List (EMIL) and extract specification questions should be submitted to EMIL@ercot.com.EMIL@ercot.com

5. Market Information System

6. Slide 6 Market Information System Objectives Upon completion of this section, you will be able to: Understand overview and layout of MIS including: –What is MIS? –Access and Security –Data and Information Classification –Market Information System Design

7. Slide 7 What is MIS? Main Entry: Market Information System Acronym: MIS Function: ERCOT Portal User Interface Live Date: 10/2010 1 : a centralized Portal for access to information, data and applications. 2 : link farm - https://mis.ercot.com/pps/tibco/mis/https://mis.ercot.com/pps/tibco/mis/ 3: Texas Market Link (TML) replacement Using a production digital certificate, Market Participants (MPs) may access the MIS during our current Market Trials activities. This environment does not currently contain all postings that will be available at Nodal go-live. The data currently available is considered Market Trials test data. MIS contains links to all external deliverables for information specifically required by Nodal Protocols and Other Binding Documents. Per Nodal Protocol 12.2(4), ERCOT may not use the MIS to post information beyond that specifically required in these protocols. Texas Market Link (TML) will stay active to support Retail and Zonal settlements postings. The decommission effort will be managed through the ERCOT project process.

8. Slide 8 Access and Security MIS is securely authenticated by the use of the digital certificate, which is assigned based on entity types and DUNS configuration. If an entity serves as more than one entity type, they would need a digital certificate for each. The MP User Security Administrator (USA) is responsible for assigning employee digital certificates and roles. Below are the Nodal digital certificate roles that will be used for MIS access: LSE_EXTRACTS TDSP_EXTRACTS MP_VIEW_SWITCH MP_CREATE_SWITCH MARKETRAK In the event an MIS session times out, the user must open a new browser and re-authenticate with their digital certificate.

9. Slide 9 Data and Information Classification Types Public Public data is available on the MIS with corresponding links on ERCOT.com. This data is considered ‘Public’ on TML today. Secure Secure data is data accessible to all MPs possessing a valid Digital Certificate. This data classification does not exist on TML today. Certified Certified data is DUNS number specific data. This is data considered ‘Private’ on TML today.

10. Slide 10 Market Information System Design MIS has been designed to more closely match the layout of ERCOT.com where functional areas and items are grouped together. Main and sub pages of the MIS are referred to as LANDING PAGES. Landing pages contain grouped content within PORTLETS. Certified portlets are configured based on entity type. Therefore, one landing page, will likely look different for each entity type. Portlets are broken down by data classification type: Public Secure Certified

11. Slide 11 Market Information System Homepage

12. Slide 12 Market Information System Design Dashboards Near real-time data feeds available on MIS secure area. Search Market Participants will have the ability to search on the MIS. View By Protocol (VBP) Listing of all MIS postings ordered by protocol section. Access to data based on role assignment by the company’s USA.

13. Slide 13 View By Protocol

14. Data Delivery Today’s TML Functionality vs. Tomorrow’s MIS Functionality

15. Slide 15 Data Delivery Objectives Upon completion, you will be able to: Recognize and understand differences in functionality between TML and MIS for: –Report Explorer vs. Reports and Extracts Index, Landing Pages –Public Extracts and Reports MIS Data Access - Summary Retail Applications

16. Slide 16 Report Explorer TML Today: One location, one Market Participant folder per DUNS number. Alphabetical list of sub-folders for extracts/reports. As of Nodal go-live, TML will only display Retail and Zonal settlements data postings.

17. Slide 17 Reports and Extracts Index MIS Tomorrow: Reports and Extracts Index Dynamic alphabetical listing of reports available to the Market Participant based on availability of data. Access to data based on role assignment by the company’s USA. As of Nodal go-live, MIS will only display Retail and Nodal data postings.

18. Slide 18 Landing Pages MIS Tomorrow: Multiple ‘Landing Pages’ and ‘Portlets’ broken down by data classification type: Public Secure Certified

19. Slide 19 Public Extracts and Reports TML Today: One Sub-folder ‘Public’ Alphabetical listing Accessible from ERCOT.com MIS Tomorrow: Multiple ‘Public’ portlets on various Landing Pages grouped by functional areas: Alphabetical listing within portlet Accessible from ERCOT.com

20. Slide 20 Retail Applications TML Today: Available under Archive and Market Activities Tabs based on Roles –Portal Resources ◦MarkeTrak –Customer Switching ◦Create Enrollment, Create Move In, Create Move Out –Continuous Service Agreements ◦Establish CSA, Delete CSA –Query ESIID Transaction ◦Find ESIID, Find Transaction –Schedule an Extract ◦Data Request – Schedule, Schedule/Unschedule an Extract

21. Slide 21 Retail Applications MIS Tomorrow: Available under the Applications Page based on digital certificate roles: –MarkeTrak –Create Enrollment –Create Move In –Create Move Out –Establish CSA –Delete CSA –Find ESIID –Find Transaction –Market Data Transparency –Extract Subscriber NOTES: The Retail applications will look like TML when clicked on in MIS until TML is decommissioned. Market Data Transparency (MDT) application will be a redirect back to TML until TML is decommissioned.

22. Slide 22 Retail Applications

23. Slide 23 Extract Scheduler vs Extract Subscriber TML Today: Schedule an Extract Schedule/Unschedule an Extract Role based function allowing MPs the ability to schedule COMS private extracts Ability to schedule and unschedule MIS Tomorrow: Extract Subscriber Role based function allowing MPs the ability to schedule COMS certified extracts Choice of output format (i.e. csv, xml, etc.) Ability to schedule and unschedule

24. Slide 24 Extract Subscriber

25. Points of Entry Downloading Content from ERCOT Delivery Options and How They Are Used

26. Slide 26 Point of Entry Objectives Upon completion, you will be able to: Identify list and function of the available points of entry for viewing and downloading data from ERCOT: –TML –MIS –Retail API –External Web Services –ERCOT.com

27. Slide 27 Texas Market Link TML Today: End User - Person to GUI MP can view and download data Not Protocol Driven Mostly CSV postings ERCOT Market Information List (EMIL) will contain Last Run Dates for retiring extracts and reports. TML decommissioning will occur through the ERCOT project process. Project is currently included on the 2011 Project Priority List (PPL).

28. Slide 28 Market Information System MIS Tomorrow: End User - Person to GUI MP can view and download data Protocol and Other Binding Documents postings only Mostly zip files containing XML and CSV files ERCOT Market Information List (EMIL) will contain list of available postings Replaces the TML after decommission efforts

29. Slide 29 Retail API Retail API Today and Tomorrow: End User – Machine to Machine Interface MP can retrieve data based on Report Type ID and date Type: any valid report type (either type name or type id) or ‘All’ Date: any valid date (YYYYMMDD) or ‘All’ Utilized for both TML and MIS postings

30. Slide 30 External Web Services EWS Tomorrow: End User – Machine to Machine Interface EWS functions: Market Transactions Submit/Query/Update/Cancel Bids, Offers, Trades and Schedules Market Information Get Awards, Forecasted/System/Total Load, LMPs, SPPs, MCPCs, etc Get Reports Get Notifications Using ‘Get Report’, MP can retrieve data based on Report ID and date Type: any valid report id Date: StartTime and EndTime are optional elements Utilized for both TML and MIS postings EIP – External Interface Specifications posted at: http://nodal.ercot.com/readiness/sandbox/index.html http://nodal.ercot.com/readiness/sandbox/index.html

31. Slide 31 ERCOT.com ERCOT.com Today: All user access to public data. Supports zonal postings, stakeholder services and ERCOT corporate communications publications. Information not limited by protocols. ERCOT.com Tomorrow: All user access to public data. Supports nodal postings, stakeholder services and ERCOT corporate communications publications. Information not limited by protocols. Zonal grid information and market information pages will be re-designed to include Nodal public postings.

32. Supporting Documentation

33. Slide 33 ERCOT Market Information List EMIL Contains information on all required external deliverables as required by Nodal Protocol 12.2(4). ERCOT.com Today: Replaces the Extract and Report Information Matrix posted at http://www.ercot.com/services/mdt/ http://www.ercot.com/services/mdt/ Nodal.ERCOT.com Today: Available under Key Documents at http://nodal.ercot.com/readiness/reports/index.html http://nodal.ercot.com/readiness/reports/index.html ERCOT.com and MIS Tomorrow: Will be available under Key Documents at http://www.ercot.com/services/mdt/http://www.ercot.com/services/mdt/ Available on the Services Landing Page in the Supporting Information Portlet

34. Slide 34 ERCOT Market Information List (EMIL) EMIL can be used for a variety of reasons including: Sorting and Filtering as needed Viewing new Nodal required deliverables Details on Protocol section or Market Guide requirements for each published item Finding EMIL Index # to locate relevant specifications in appropriate documentation Acquiring Report ID for the ‘Get Report’ Web Services Currently adding information for Market Trial Available deliverables Slide 34

35. Slide 35 EMIL Slide 35

36. Slide 36 EMIL Information is categorized: Nodal Zonal/Nodal – No Change, Zonal/Nodal – Modify Retail and Zonal – Will Retire Slide 36

37. Slide 37 EMIL EMIL Contains: Index # and corresponding Report ID Product Name Generating Frequency Protocol Reference(s) Location or method of distribution (MIS, API, etc.) Security Classification Slide 37

38. Slide 38 EMIL EMIL Tab Items located on the EMIL tab in the EMIL list are required protocol or market guide postings. Slide 38

39. Slide 39 EMIL Non MIS Postings Tab Non-protocol-driven information posted to http://ERCOT.com http://ERCOT.com Same overview information Information contained here includes all legal and media references, all market rules postings and any reports not required by Protocols Slide 39

40. Slide 40 EMIL Applications Web Services Tab Includes all Retail Web Services, Market Data Transparency Web Services and all Nodal Web Services in support of nodal and as required by the Protocols Utilize ‘Get Report’ feature to retrieve documents with an assigned Report ID All other Web Services are submission, change, cancel or query functions. Slide 40

41. Slide 41 EMIL Alerts & Notices Tab Includes all Alerts & Notifications as required by the protocols and posted to the MIS and/or the MMS and OS User Interfaces. The items outlined in the EIP Specifications are delivered automatically via the Nodal Web Services to the Market Participant ‘computer to computer’. There are additional Notifications that are created and published via the MIS and post to either the MIS UI and/or ERCOT.com. Slide 41

42. Slide 42 DDLs and XSDs ERCOT.com and TML Today: Available under DDLs or XSDs at http://www.ercot.com/services/mdt/http://www.ercot.com/services/mdt/ Available on TML under the Public Folder, Sub-Folder Extract Data Definitions Nodal.ERCOT.com Today: Drafts available on the Readiness Center at http://nodal.ercot.com/readiness/reports/index.html http://nodal.ercot.com/readiness/reports/index.html ERCOT.com and MIS Tomorrow: Available under DDLs or XSDs at http://www.ercot.com/services/mdt/http://www.ercot.com/services/mdt/ Available on the Services Landing Page in the Supporting Information Portlet

43. Slide 43 DDLs and XSDs Data Definition Language (DDL) XML Schema Definitions (XSD) Provides necessary information that allows users to load ERCOT data into their own environments Contains metadata information, including: ◦Data type of each field ◦Brief description of the data that is to be loaded into each column ◦Any table or character/precision constraints or alterations Slide 43

44. Slide 44 Example – Settlements DDL DDL provides structure for CSV file Slide 44

45. Slide 45 Example – Settlements DDL DDL table/column definitions Slide 45

46. Slide 46 Example – Settlements XSD XSD files provide format & tag info for your XML files (DDL files provide structure for CSV file) Slide 46

47. Slide 47 Example – Settlements XSD Slide 47

48. Slide 48 User Guides ERCOT.com Today: Zonal User Guides available at http://www.ercot.com/services/mdt/userguides/http://www.ercot.com/services/mdt/userguides/ Nodal.ERCOT.com Today: Draft Nodal User Guides available Key Documents at http://nodal.ercot.com/readiness/reports/index.html http://nodal.ercot.com/readiness/reports/index.html ERCOT.com and MIS Tomorrow: All active User Guides available at http://www.ercot.com/services/mdt/userguides/ http://www.ercot.com/services/mdt/userguides/ Available on the Services Landing Page in the Supporting Information Portlet

49. Slide 49 Extract and Report Specifications Document Nodal.ERCOT.com Today: Specifications are available at http://nodal.ercot.com/readiness/reports/sp/index.html http://nodal.ercot.com/readiness/reports/sp/index.html Available for new or modified nodal extracts and reports Excludes ad-hoc manual postings ERCOT.com Tomorrow: Specifications will be available under Key Documents at http://www.ercot.com/services/mdt/ http://www.ercot.com/services/mdt/ Available for new or modified nodal extracts and reports Excludes ad-hoc manual postings

50. Slide 50 Example - DAM MODE Specification Slide 50

51. Questions??

52. Extracts & Reports

53. Slide 53 Objectives Upon completion, you will be able to: Identify list of extracts and reports used in Retail Market: –No change –Modified –Retiring & Replaced Understand data posting location Identify location of reference materials

54. Slide 54 No Change This list of extracts and reports will have no change to the content and content format with the transition into Nodal. Posting: TML, MIS. Public postings also available on www.ercot.com.www.ercot.com 867 Received on Cancelled Service Orders (RCSO) Report 867_03 Error Report (867_03 Activity Report) 997 Report Annual Distribution Loss Factors Report Annual Transmission Loss Factors Methodology Report Backcasted Load Profiles Extract Default Profile ESIID Report ERO Fee Assessment LSE Share Report Forecasted Load Profiles Extract IDR Requirement Report Interval Data LSE Activity Report Load Estimation Counts (Certified & Public) Mapping Status Reject Report MarkeTrak Background Reports MarkeTrak Bulk Submissions Report MIMO Exceptions Report Missing 867 Report POLR Customer Class Even Year Report Potential Load Loss Report Siebel Service Order Extract Supplemental AMS Interval Data Extract Supplemental IDR Required Interval Data Extract TDSP ESI ID Extract (Full) and (Weekly) Weather Responsiveness Change Report

55. Slide 55 Modified This list of extracts and reports will have modifications to the name, content and/or content format with the transition into Nodal. Posting: TML, MIS. Public postings also available on www.ercot.com.www.ercot.com ESIID Service History And Usage Extract Missing Consumption Report Provide All ESIID Extract Records (web service) Public Reference Data Extract TDSP Distribution Loss Factors Actual TDSP Distribution Loss Factors Forecasted TDSP Transmission Loss Factors Actual TDSP Transmission Loss Factors Forecasted

56. Slide 56 ESIID Service History and Usage Extract Posting: TML, MIS Specification: ZP12-245 worksheet - http://nodal.ercot.com/readiness/reports/sp/index.html http://nodal.ercot.com/readiness/reports/sp/index.html Draft DDL: http://nodal.ercot.com/readiness/reports/DDL/DDL/Draft%20ESIID%20E xtract%20DDL%20v.09.txt http://nodal.ercot.com/readiness/reports/DDL/DDL/Draft%20ESIID%20E xtract%20DDL%20v.09.txt Draft User Guide: will be posting to http://nodal.ercot.com/readiness/reports/index.html http://nodal.ercot.com/readiness/reports/index.html Draft Join Documentation: ESIID Join Diagram v0.01 - http://nodal.ercot.com/readiness/reports/index.html http://nodal.ercot.com/readiness/reports/index.html Summary of changes: –Addition of tables SETTLEMENTPOINT, SETLPOINTTYPE, and SETLPOINTHISTORY

57. Slide 57 Missing Consumption Report Posting: TML, MIS Specification: NP10-771 worksheet - http://nodal.ercot.com/readiness/reports/sp/index.html http://nodal.ercot.com/readiness/reports/sp/index.html Summary of changes: –ESIID Record will be reported when there is no NIDR, IDR, AMS interval data loaded (based on the Profile Code) for sysdate – 38 days. –Dropping the Last Received column, which is blank today. –Header will include: ◦ID ◦MREDUNS ◦METERTYPE

58. Slide 58 Provide All ESIID Extract Records (web service) Posting: TML, MIS Specification: COMS-438 worksheet - http://nodal.ercot.com/readiness/reports/sp/index.html http://nodal.ercot.com/readiness/reports/sp/index.html Draft XSD: needs to be posted http://nodal.ercot.com/readiness/reports/XSD/index.html http://nodal.ercot.com/readiness/reports/XSD/index.html Draft User Guide: needs to be posted http://nodal.ercot.com/readiness/reports/index.html http://nodal.ercot.com/readiness/reports/index.html Summary of changes: –Addition of tables SETTLEMENTPOINT, SETLPOINTTYPE, and SETLPOINTHISTORY

59. Slide 59 Public Reference Data Extract Posting: TML, MIS Specification: ZP12-465 worksheet - http://nodal.ercot.com/readiness/reports/sp/index.html http://nodal.ercot.com/readiness/reports/sp/index.html Draft DDL: DRAFT PRDE DDL v0.13 - http://nodal.ercot.com/readiness/reports/DDL/index.html http://nodal.ercot.com/readiness/reports/DDL/index.html Draft XSD: DRAFT PRDE XSD v0.13 - http://nodal.ercot.com/readiness/reports/XSD/index.html http://nodal.ercot.com/readiness/reports/XSD/index.html Draft User Guide: Draft PRDE User Guide - http://nodal.ercot.com/readiness/reports/index.html http://nodal.ercot.com/readiness/reports/index.html Summary of changes: –Available in CSV and XML –Addition of tables to support the following extracts: Balancing Account Extract Capacity Factors Report Confidentiality Expired Adjusted Meter Load Report CRR Auction Revenue Distribution (CARD) Extract DAM Consolidated Operating Day Extract DAM Market Operating Day Extract ESIID Service History and Usage Extract RTM Consolidated Operating Day Extract RTM Market Operating Day Extract RUC Make Whole & Clawback Report Settlements Input Data Extract

60. Slide 60 TDSP Distribution Loss Factors Actual Posting: MIS, http://www.ercot.com/mktinfo/data_agg/http://www.ercot.com/mktinfo/data_agg/ Specification: NP13-9 worksheet - http://nodal.ercot.com/readiness/reports/sp/index.html http://nodal.ercot.com/readiness/reports/sp/index.html Summary of changes: –Name change: Actual TDSP Distribution Loss Factors Report –Removed multiple header rows –Added the Recorder, TDSP Code, DUNS number, Loss Code, and LSTIME columns

61. Slide 61 TDSP Distribution Loss Factors Forecasted Posting: MIS, http://www.ercot.com/mktinfo/data_agg/http://www.ercot.com/mktinfo/data_agg/ Specification: NP13-262 worksheet - http://nodal.ercot.com/readiness/reports/sp/index.html http://nodal.ercot.com/readiness/reports/sp/index.html Summary of changes: –Name change: Forecasted TDSP Distribution Loss Factors Report –Removed multiple header rows –Added the Recorder, TDSP Code, DUNS number, Loss Code, and LSTIME columns –Added a separate header row for the LFORERCOT data record that is reported for 24 hourly intervals

62. Slide 62 TDSP Transmission Loss Factors Actual Posting: MIS, http://www.ercot.com/mktinfo/data_agg/http://www.ercot.com/mktinfo/data_agg/ Specification: NP13-14 worksheet - http://nodal.ercot.com/readiness/reports/sp/index.html http://nodal.ercot.com/readiness/reports/sp/index.html Summary of changes: –Name change: Actual TDSP Transmission Loss Factors Report –Removed multiple header rows –Added the Recorder and LSTIME columns

63. Slide 63 TDSP Transmission Loss Factors Forecasted Posting: MIS, http://www.ercot.com/mktinfo/data_agg/http://www.ercot.com/mktinfo/data_agg/ Specification: NP13-262 worksheet - http://nodal.ercot.com/readiness/reports/sp/index.html http://nodal.ercot.com/readiness/reports/sp/index.html Summary of changes: –Name change: Forecasted TDSP Transmission Loss Factors Report –Added the Recorder and LSTIME columns –Added a separate header row for the LFORERCOT data record that is reported for 24 hourly intervals

64. Slide 64 Retiring & Replaced This list of extracts and reports will be retiring with the transition into Nodal and have a corresponding extract/report or new posting for the data. Posting: MIS Data Aggregation Daily Postings (UFE Reports)/Unaccounted For Energy Load Estimation Volumes – Certified Load Estimation Volumes – Public Load Extract Provide Public Data Extract (web service) WS and NWS IDR Proxy Dates

65. Slide 65 Data Aggregation Daily Postings (UFE Reports)/ Unaccounted For Energy retires with the last settlement of the last Zonal operating day (11/30/2010 to be posted ~06/2011) –Posting: TML, http://www.ercot.com/mktinfo/data_agg/http://www.ercot.com/mktinfo/data_agg/ Real Time Market Market Operating Day Extract (RTM MODE) will include load data for Nodal operating days (12/1/2010 first operating day) –Posting: MIS

66. Slide 66 Data Aggregation Daily Postings (UFE Reports)/ Unaccounted For Energy - continued Information on RTM MODE: Specification: NP12-749 worksheets - http://nodal.ercot.com/readiness/reports/sp/index.html http://nodal.ercot.com/readiness/reports/sp/index.html Draft DDL: DRAFT Settlements DDL v0.13 - http://nodal.ercot.com/readiness/reports/DDL/index.html http://nodal.ercot.com/readiness/reports/DDL/index.html Draft XSD: DRAFT Settlements XSD v0.13 - http://nodal.ercot.com/readiness/reports/XSD/index.html http://nodal.ercot.com/readiness/reports/XSD/index.html Draft User Guide: Draft Settlements User Guide - http://nodal.ercot.com/readiness/reports/index.html http://nodal.ercot.com/readiness/reports/index.html Draft Join Documentation: Draft Settlement DDL Join Document v0.01 - http://nodal.ercot.com/readiness/reports/index.html http://nodal.ercot.com/readiness/reports/index.html Highlights: –Data is posted by approved operating day –Includes all secure data for the operating day

67. Slide 67 Load Estimation Volumes - Certified Load Estimation Volumes Certified retires with the last settlement of the last Zonal operating day (11/30/2010 to be posted ~06/2011) –Posting: TML Real Time Market Consolidated Operating Day Extract (RTM CODE) will include load data for Nodal operating days (12/1/2010 first operating day) –Posting: MIS

68. Slide 68 Load Estimation Volumes - Certified - continued Information on RTM CODE: Specification: NP12-747 worksheets - http://nodal.ercot.com/readiness/reports/sp/index.html http://nodal.ercot.com/readiness/reports/sp/index.html Draft DDL: DRAFT Settlements DDL v0.13 - http://nodal.ercot.com/readiness/reports/DDL/index.html http://nodal.ercot.com/readiness/reports/DDL/index.html Draft XSD: DRAFT Settlements XSD v0.13 - http://nodal.ercot.com/readiness/reports/XSD/index.html http://nodal.ercot.com/readiness/reports/XSD/index.html Draft User Guide: Draft Settlements User Guide - http://nodal.ercot.com/readiness/reports/index.html http://nodal.ercot.com/readiness/reports/index.html Draft Join Documentation: Draft Settlement DDL Join Document v0.01 - http://nodal.ercot.com/readiness/reports/index.html http://nodal.ercot.com/readiness/reports/index.html Highlights: –Data is posted by approved operating day –Includes all certified data for the specific market participant –Must be scheduled using Extract Subscriber

69. Slide 69 Load Estimation Volumes - Public Load Estimation Volumes Public retires with the last settlement of the last Zonal operating day (11/30/2010 to be posted ~06/2011) –Posting: TML, http://www.ercot.com/mktinfo/data_agg/http://www.ercot.com/mktinfo/data_agg/ Real Time Market Market Operating Day Extract (RTM MODE) will include load data for Nodal operating days (12/1/2010 first operating day) –Posting: MIS

70. Slide 70 Load Estimation Volumes - Public - continued Information on RTM MODE: Specification: NP12-749 worksheets - http://nodal.ercot.com/readiness/reports/sp/index.html http://nodal.ercot.com/readiness/reports/sp/index.html Draft DDL: DRAFT Settlements DDL v0.13 - http://nodal.ercot.com/readiness/reports/DDL/index.html http://nodal.ercot.com/readiness/reports/DDL/index.html Draft XSD: DRAFT Settlements XSD v0.13 - http://nodal.ercot.com/readiness/reports/XSD/index.html http://nodal.ercot.com/readiness/reports/XSD/index.html Draft User Guide: Draft Settlements User Guide - http://nodal.ercot.com/readiness/reports/index.html http://nodal.ercot.com/readiness/reports/index.html Draft Join Documentation: Draft Settlement DDL Join Document v0.01 - http://nodal.ercot.com/readiness/reports/index.html http://nodal.ercot.com/readiness/reports/index.html Highlights: –Data is posted by approved operating day –Includes all secure data for the operating day

71. Slide 71 Load Extract Load Extract retires with the last settlement of the last Zonal operating day (11/30/2010 to be posted ~06/2011) –Posting: TML Real Time Market Consolidated Operating Day Extract (RTM CODE) & Real Time Market Market Operating Day Extract (RTM MODE) will include load data for Nodal operating days (12/1/2010 first operating day) –Posting: MIS

72. Slide 72 Load Extract - continued Information on RTM CODE & RTM MODE: Specification: NP12-747 & NP 12-749 worksheets - http://nodal.ercot.com/readiness/reports/sp/index.html http://nodal.ercot.com/readiness/reports/sp/index.html Draft DDL: DRAFT Settlements DDL v0.13 - http://nodal.ercot.com/readiness/reports/DDL/index.html http://nodal.ercot.com/readiness/reports/DDL/index.html Draft XSD: DRAFT Settlements XSD v0.13 - http://nodal.ercot.com/readiness/reports/XSD/index.html http://nodal.ercot.com/readiness/reports/XSD/index.html Draft User Guide: Draft Settlements User Guide - http://nodal.ercot.com/readiness/reports/index.html http://nodal.ercot.com/readiness/reports/index.html Draft Join Documentation: Draft Settlement DDL Join Document v0.01 - http://nodal.ercot.com/readiness/reports/index.html http://nodal.ercot.com/readiness/reports/index.html Highlights: –Data is posted by approved operating day –MODE – includes all secure data for the operating day –CODE – includes all certified data for the specific market participant –CODE – must be scheduled using Extract Subscriber

73. Slide 73 Provide Public Data Extract (web service) Provide Public Data Extract (web service) retires at Nodal go-live 12/1/2010 –Posting: TML Draft XSD: needs to be posted http://nodal.ercot.com/readiness/reports/XSD/index.html http://nodal.ercot.com/readiness/reports/XSD/index.html Draft User Guide: needs to be posted http://nodal.ercot.com/readiness/reports/index.html http://nodal.ercot.com/readiness/reports/index.html Public Reference Data Extract will be posted on a daily basis including a full data set as of the previous day –Posting: MIS

74. Slide 74 WS and NWS Proxy Dates WS and NWS Proxy Dates retires with the last initial zonal settlement (11/30/2010 operating day to be posted 12/7/2010) –Posting: TML Public Reference Data Extract will be posted on a daily basis including a full data set as of the previous day –Posting: MIS

75. Slide 75 WS and NWS Proxy Dates - continued Information on PRDE: Specification: ZP12-465 worksheet - http://nodal.ercot.com/readiness/reports/sp/index.html http://nodal.ercot.com/readiness/reports/sp/index.html Draft DDL: DRAFT PRDE DDL v0.13 - http://nodal.ercot.com/readiness/reports/DDL/index.html http://nodal.ercot.com/readiness/reports/DDL/index.html Draft XSD: DRAFT PRDE XSD v0.13 - http://nodal.ercot.com/readiness/reports/XSD/index.html http://nodal.ercot.com/readiness/reports/XSD/index.html Draft User Guide: Draft Public Reference Data Extract User Guide - http://nodal.ercot.com/readiness/reports/index.html http://nodal.ercot.com/readiness/reports/index.html Highlights: –Latest full data set published on a daily basis

76. Slide 76 Other Changes Upcoming change to download file name from TML and Retail API coming before October 2010 30 day market notice will be sent with the new download format Purpose is to ensure consistency between TML, Retail API, MIS, EWS for file downloads No change to the display file naming convention. Format will remain: ext.(mm-dd-yyyy hh24:mi:ss).extract_name.extenstion ext/rpt/msc may be used in the first component of the file name. New download file naming convention: ext.000RPTID.000000000000DUNS.yyyymmdd.hh24miss.Extract_Name.extension

77. Questions??