# XML Schema Documentation

### Complex Type: Lag

#### [Table of contents]

Super-types: | None
Sub-types: | None

Name | Lag
Used by (from the same schema document) | Complex Type CommodityPricingDates , Model Group LagOrReference.model
Abstract | no
Documentation | An observation period that is offset from a Calculation Period.

XML Instance Representation
<...
id=" xsd:ID [0..1]">
<lagDuration> Interval </lagDuration> [1]

'The period during which observations will be made. If a firstObservationDateOffset is specified, the observation period will start the specified interval prior to each Calculation Period - i.e. if the firstObservationDateOffset is 4 months and the lagDuration is 3 months, observations will be taken in months 4,3 and 2 (but not 1) prior to each Calculation Period. If no firstObservationDate is specified, the observation period will end immediately preceding each Calculation Period.'

<firstObservationDateOffset> Interval </firstObservationDateOffset> [0..1]

'The interval between the start of each lagDuration and the start of each respective calculation period.'

</...>
Diagram
Schema Component Representation
<xsd:complexType name="Lag">
<xsd:sequence>
<xsd:element name="lagDuration" type=" Interval "/>
<xsd:element name="firstObservationDateOffset" type=" Interval " minOccurs="0"/>
</xsd:sequence>
<xsd:attribute name="id" type=" xsd:ID "/>
</xsd:complexType>