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Andrew Newbigging Vice President, Integrations Development

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Presentation on theme: "Andrew Newbigging Vice President, Integrations Development"— Presentation transcript:

1 Using web service technologies for incremental, real-time data transfers from EDC to SAS
Andrew Newbigging Vice President, Integrations Development 19th October 2010 Medidata Solutions, Inc. Proprietary - Medidata and Authorized Clients Only. This document contains proprietary information that shall be distributed, routed or made available only within Medidata, except with written permission of Medidata.

2 Agenda Introduction General Considerations Web Services Conclusion

3 Introduction Data transfers from EDC to SAS are typically cumulative (all data) transferred in batch mode (infrequently) in files formatted in a SAS proprietary format: How can we utilize modern technologies and standards to improve efficiency, reliability and information density? EDC SAS

4 Agenda Introduction General Considerations Web Services Conclusion

5 Cumulative data volumes in a clinical study

6 Average daily change

7 Cuumulative vs. incremental
Cumulative Incremental Repeated re-transfer of unchanged data: inefficient and time-consuming Only data changes transferred: maximum efficiency Difficult to achieve real-time data transfer Near real-time transfer possible Entire data set always sent – no data lost if one transfer fails How to recover from a transfer error: checksum/resend protocol required - + - + - +

8 Data transfer formats Desirable features:
Support any clinical study design and data Human-readable Self-describing (metadata) Support for incremental or cumulative transfers Open, not proprietary, format

9 Data transfer formats and standards
Text SAS CDISC SDTM CDISC ODM All studies Y N Human readable Metadata (Y) Incremental / cumulative Open standard

10 CDISC ODM – Clinical data structure

11 CDISC ODM - Example

12 Agenda Introduction General Considerations Web Services Conclusion

13 Web services Web services are application programming interfaces (API) that are accessed via the Hypertext Transfer Protocol (HTTP) Simple Object Access Protocol (SOAP) is one style Representational State Transfer (REST) is our preferred approach

14 REST REST uses HTTP methods or verbs:
GET PUT POST DELETE To access objects via Uniform Resource Identifiers (URI) Returning HTTP status codes: 200 OK 401 Unauthorized 404 Not Found

15 REST in the browser - 1

16 REST in the browser - 2

17 REST in the browser - 3

18 REST from the command line - 1
curl -u username:password -H 'Content-Type:text/xml' -v * About to connect() to port 443 (#0) * Trying connected * Connected to ( ) port 443 (#0) * SSLv3, TLS handshake, Client hello (1): * SSLv3, TLS handshake, Server hello (2): * SSLv3, TLS handshake, CERT (11): * SSLv3, TLS handshake, Server finished (14): * SSLv3, TLS handshake, Client key exchange (16): * SSLv3, TLS change cipher, Client hello (1): * SSLv3, TLS handshake, Finished (20): * SSL connection using RC4-MD5 * Server certificate: * subject: O=*; OU=Domain Control Validated; CN=* * start date: :49:39 GMT * expire date: :34:46 GMT * subjectAltName: matched * issuer: C=US; ST=Arizona; L=Scottsdale;, Inc.; OU= CN=Go Daddy Secure Certification Authority; serialNumber= * SSL certificate verify ok.

19 REST from the command line - 2
* Server auth using Basic with user 'username' > GET /RaveWebServices/studies/Mediflex/datasets/regular/AE HTTP/1.1 > Authorization: Basic ******************************** > User-Agent: curl/ (universal-apple-darwin10.0) libcurl/ OpenSSL/0.9.8l zlib/1.2.3 > Host: > Accept: */* > Content-Type:text/xml > < HTTP/ OK < Date: Tue, 14 Sep :18:05 GMT < Content-Type: text/xml < <?xml version="1.0" encoding="utf-8"?> <ODM FileType="Snapshot" FileOID=" f aad3-e9f12459ca20" CreationDateTime=" T01:18: :00" ODMVersion="1.3" xmlns:mdsol=" xmlns:xlink=" xmlns="

20 Incremental requests studies/Mediflex/datasets/regular/AE? start= T15:00:00 ODM TransactionType: Insert Update Remove

21 REST and SAS Clinical Data Integration(CDI)

22 REST and SAS CDI GET list of studies
GET study metadata /studies/Mediflex/metadata/ GET clinical data /studies/Mediflex/datasets/

23 Challenges Consistency Metadata versions
Incremental transfers are more efficient, but how can the overall integrity of transferred data be assessed? Hash functions (md5, sha1, etc) being investigated Metadata versions To accommodate changes during a study (for example a protocol amendment) CDISC ODM may have multiple metadata versions There are no constraints on changes between versions Extra care needed to ensure that the correct metadata version is applied to each data point

24 Agenda Introduction General Considerations Web Services Conclusion

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