1 / 44

Navigating the MDDL Specification

Navigating the MDDL Specification. James E. Hartley Chief Technologist, FISD 29 April 2003. Topics. What’s in a Release? Terminology In the Data Model When Viewing the Schemas In Instance Documents Useful Tools and Features Considered. What’s in a Release?.

lucian
Download Presentation

Navigating the MDDL Specification

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Navigating theMDDL Specification James E. Hartley Chief Technologist, FISD 29 April 2003

  2. Topics • What’s in a Release? • Terminology • In the Data Model • When Viewing the Schemas • In Instance Documents • Useful Tools and Features Considered

  3. What’s in a Release? • Data Model – the Source .XML file • Glossary – Terms and Definitions • The Base Schema – no inheritance • The Full Schema – inheritance allowed • Schema Docs (Pictures from the Base) • Technical Specification (Word Doc) • Supporting XML/XSD Files

  4. Supporting XML/XSD Files • mddlref-*.xsd • For Special Element “references” • mddllink-*.xsd • For XLink functionality (advanced) • xml.xsd • Standard XML attributes

  5. Sender Recipient Container Property Base Type Classification Construct Domain (Class, Subclass) Scheme (C.V.) References Period Group Inheritance Shorthand Special Words Used in MDDL

  6. Special Word: Sender, Recipient • A Sender is the individual, system, organization that generates and transmits (delivers) an MDDL instance document • A Receiver (can you guess?) is the system (etc.) that receives an instance document

  7. Special Word: Container • A Container is an MDDL element intended to hold other elements and DOES NOT have a value of its own. • Example (“ask” is a “Container”): <ask> <last>102.34</last> </ask>

  8. Special Word: Property • A Property is an MDDL element that has a value of its own – and MAY hold other properties • Example (“last” is a “Decimal”): <last> <mdDecimal>102.34</mdDecimal> <currency>USD</currency> </last>

  9. Special Word: Base Type • The Base Type of a property or a container implies the atomic type, or content model, for the element. • Example: • “ask” is of Base Type “container” • “last” is of Base Type “decimal” • “address” is of Base Type “string” • “issueDate” is of Base Type “dateTime”

  10. string decimal integer boolean dateTime duration uri math (in Schemas) container Base Types

  11. Special Word: Classification • A Classification identifies what children properties are necessary to fully qualify a property. • Example: • “last” is of Classification “Price” • “issueDate” is of Classification “DateTime” • “peRatio” is of Classification “Rate” • “daysInMonth” is of Classification “Quantity”

  12. DateTime Rate Measure Quantity Price Fee Amount Container Root Enumeration Simple Classifications

  13. Classification: DateTime • Must (May) Have the Following Children: • indicatorsType • marketCenter • sequence • source

  14. previousDateTime sequence source valuationType valuationRef calculationType dateTime fraction indicatorsType marketCenter multiplier Classification: Rate

  15. Classification: Measure, Quantity • Measure: Identical to “Rate” • Quantity: “Rate” plus • unitType

  16. Classification: Price, Fee, Amount • Price, Fee, Amount: “Rate” plus • currency • paymentType

  17. Classification: Container, Root • “Container” is a Placeholder for containers • No real values • Will ONLY contain children elements • All Domains, Classes, Subclasses • There is Only One “Root” Element • You guessed it – “mddl”

  18. Classification: Enumeration • Property Constrained by Discrete Values • Treated as a String • Attribute “scheme” • Identifies the controlled vocabulary (C.V.) • May default to value in Schema • C.V. Lists Legal Values for Property • For example, ISO Country Codes • Consider, however, NYSE Listed Instruments

  19. Classification: Simple • Basic property • May have children properties • Governed by Base Type • Like a Container – but may have a value

  20. Special Word: Construct • A Construct is a top-level element that loosely identifies the REASON for the market data provided in the document • A “snap” is for a Snapshot of data at an instant in time (dateTime provided) • A “timeseries” holds a related collection of “snap”s (as separate “event”s)

  21. Special Word: Domain, Class, Subclass • A Domain, Class, or Subclass is a container used to classify and organize properties for a specific asset class. • Defines Financial Product Hierarchy • equityDomain, commonClass • civDomain, fundClass, mutualSubclass • civDomain, fundClass, moneyMarketSubclass • Instruments Identified at Lowest Level

  22. Special Word: Controlled Vocabulary • A Controlled Vocabulary (or Scheme) is a list of terms used to constrain the legal values of a string property. • MDDL catalogues two types: • Internal C.V.s are those that are created and maintained by MDDL.org and are intended to contain an exhaustive list of terms • External C.V.s are those used in MDDL but not controlled by MDDL. Likely NOT exhaustive.

  23. Special Word: C.V. (con’t) • Examples of External Schemes: • Exhaustive Lists Maintained (Copies): • ISO 3166 Country Codes • ISO 4217 Currency Codes • Thirdparty sources of data • Lists Referenced (and not maintained): • Ticker Symbols by Exchange • ISO 10383 Market Identification Code • ISO 10962 Classification of Financial Instruments

  24. Special Elements • <mddl version=“2.0-draft”> • header • other (for extensions) • references • Any “*Group” • Subordinate container facilitates inheritance • All Containers, Domains, Classes, Subclasses

  25. Special Element: references • The references element within the header can be used to hold common information • The container or property is given an “id” attribute (per normal XML guidelines) • Then the common content can be pointed to in place of actual content using the “mddlref” namespaced elements • NOTE: MAY BE DEPRECATED

  26. Special Element: references (con’t) • This (if used multiple times): <agent> <location> <address>123 Institution Ave</address> <municipality>Somewhere</municipality> <stateOrProvince>AB</stateOrProvince> <postalCode>12345-1234</postalCode> </location> </agent>

  27. Special Element: references (con’t) • Place it in the “references” element: <header><references> <location id=“locationID”> <address>123 Institution Ave</address> <municipality>Somewhere</municipality> <stateOrProvince>AB</stateOrProvince> <postalCode>12345-1234</postalCode> </location> </references></header>

  28. Special Element: references (con’t) • And then reference it: <agent> <ref:location xlink:href=“#locationID”/> </agent> • Benefits: • Removes duplicated data • Syntax allows “editing” referenced content • Drawback: Complicates processing

  29. Special Properties • instrumentIdentifier (and similars) • fraction • multiplier • period • sequence

  30. Special Property: instrumentIdentifier • Element to Define Instrument of Interest <instrumentIdentifier> <name>Your Favorite Fund</name> <code scheme=“http://www.ypd.net/symbol”> <mdString>YFF</mdstring> <nameRef>../../name</nameRef> </code> </instrumentIdentifier>

  31. instrumentIdentifier (con’t) • Scheme Identifies Symbology: • ISIN (ISO 6166): http://www.mddl.org/ext/scheme/iso6166 • Numbering Agencies: http://www.mddl.org/ext/scheme/agency?SRC=SEDOL • Tickers: http://www.mddl.org/ext/scheme/ticker?MIC=ABC • Additional Syntax for Identifying Scope: <scopeType>international</scopeType>

  32. Special Property: fraction • The fraction element can be used if it is important to know that a value is to be rounded or that a decimal is a fraction • Number rounded, truncate for display: <mdDecimal>123.43</mdDecimal> <fraction actualDenominator=“1000” displayDenominator=“10”/>

  33. Special Property: fraction (con’t) • Decimal doesn’t reflect quoting unit: <mdDecimal>123.1875</mdDecimal> <faction actualDenominator=“32” displayDenominator=“8”/>

  34. Special Property: multiplier • The multiplier indicates all quoted values should be multiplied by the factor • USE SPARINGLY (complicates processing) • Multiply by 0.01 to get GBP: <currency> <mdString>GBP</mdString> <multiplier>0.01</multiplier> </currency>

  35. Special Property: period • A period can specify date and times: • A “start”, an “end”, a “duration” • Any combination of the above • As well a “recurring” indicator <period><recurring>true</recurring> <start>2003-04-01T11:00:00Z</start> <end>2004-04-01T11:00:00Z</end> <duration>P1M</duration> </period>

  36. Special Property: sequence • The sequence property is a unique identifier given to an instance document, assigned by the sender, to facilitate sequencing and missed updates • Should be lexically increasing (it’s a string) • May indicate a previous document which this one replaces (due to error, etc.)

  37. Special Word: Inheritance • This: <ask> <last><mdDecimal>102.34</mdDecimal> <currency>USD</currency> </last> <high><mdDecimal>103.95</mdDecimal> <currency>USD</currency> </high> </ask>

  38. Special Word: Inheritance (con’t) • Becomes: <ask> <currency>USD</currency> <last><mdDecimal>102.34</mdDecimal></last> <high><mdDecimal>103.95</mdDecimal></high> </ask>

  39. Special Word: Shorthand • This: <last> <mdDecimal>102.34</mdDecimal> </last> • Becomes: <last>102.34</last>

  40. Inheritance and Shorthand • This: <ask> <last><mdDecimal>102.34</mdDecimal> <currency>USD</currency> </last> <high><mdDecimal>103.95</mdDecimal> <currency>USD</currency> </high> </ask>

  41. Inheritance and Shorthand (con’t) • Becomes: <ask> <currency>USD</currency> <last>102.34</last> <high>103.95</high> </ask>

  42. Remember the Processing Rules • Explode Shortcuts: • Inheritance, Shorthands, References • Before Validation or Processing • Tony Coates Will Cover Details

  43. Useful Tools and Features Considered • Glossary and Schema Docs Tied Together • Highlighting “Base Type” and “Classification” • Ability to Generate Extended Schemas • Use MDDL Data Model to add extensions • Ability to Generate Limited Schemas • For specific Domains/Classes/Subclasses

  44. Questions? Discussion?

More Related