Help:DataTable2

The <datatable2> tag creates a data table to store structured data for use in RiskModel calculations or DropDown menus. It is typically defined on a "/Data" subpage to organize risk-related data for RiskiPedia pages.

Syntax

The <datatable2> tag uses these attributes:

`table`: (Required) A unique name for the table (e.g., `time_of_day`).
`columns`: (Required) A pipe-separated list of column names (e.g., `time_period|time_fatality_multiplier`).

The tag’s content includes a `<head>` section with wikitext table headers (starting with `!`) and data rows using pipe (`|`) separators.

Basic syntax:

<datatable2 table="TableName" columns="column1|column2">
<head>
!Column 1
!Column 2
</head>
Value1|Value2
Value3|Value4
</datatable2>

Usage

1. Use the <datatable2> tag to define a table, typically on a "/Data" subpage, specifying a unique `table` name and `columns`. 2. In the `<head>` section, define column headers using wikitext table syntax (e.g., `!Header`). 3. Add data rows with values separated by pipes (`|`), matching the order of columns. 4. Reference the table in a <dropdown> tag to display its data in a menu, or use its column names as variables in a RiskModel or RiskDisplay calculation.

The <datatable2> tag stores data that can be selected via <dropdown> or used in risk calculations with <riskmodel> or <riskdisplay>.

Examples

Time of Day Risk Factors

Define a table for time-of-day risk multipliers:

<datatable2 table="time_of_day" columns="time_period|time_fatality_multiplier|time_injury_multiplier">
<head>
!Time of day
!Fatality risk multiplier
!Injury risk multiplier
</head>
Day|1.0|1.0
Night|3.56|1.47
</datatable2>

This table, named "time_of_day", can be used in a <dropdown> to select "Day" or "Night", or its columns (`time_fatality_multiplier`, `time_injury_multiplier`) can be variables in a <riskmodel>.

Seatbelt Use Risk Factors

Define a table for seatbelt usage:

<datatable2 table="seatbelt_use" columns="belt_status|belt_fatality_multiplier|belt_injury_multiplier">
<head>
!Seat-belt usage
!Fatality risk multiplier
!Injury risk multiplier
</head>
Worn|1.0|1.0
Not worn|1.82|2.0
</datatable2>

This table, "seatbelt_use", supports a <dropdown> for selecting "Worn" or "Not worn" and provides variables like `belt_fatality_multiplier` for calculations.

Combined with RiskModel and Dropdown

Use a table with a <dropdown> and <riskmodel> on a driving risk page:

<datatable2 table="DrivingConditions" columns="condition|fatality_risk">
<head>
!Driving condition
!Fatality risk multiplier
</head>
Dry|1.0
Wet|1.5
</datatable2>
<riskmodel name="DrivingRisk" calculation="base_probability * fatality_risk">Your risk is about {result}%</riskmodel>
<dropdown table="DrivingConditions" title="Select condition" label_column="condition" />
<riskdisplay model="DrivingRisk" />

This defines a "DrivingConditions" table, a <riskmodel> using its `fatality_risk` column, a <dropdown> to select a condition, and a <riskdisplay> to show the result.

Notes

The `table` name must be unique, especially on "/Data" subpages, to avoid conflicts.
Column names in the `columns` attribute must match the order of headers and data in the table.
Use column names as variables in RiskModel or RiskDisplay calculations, or specify a column in a <dropdown> `label_column`.
Tables are often defined on "/Data" subpages but can be referenced from main pages using full names (e.g., `PageName/Data:TableName`).

Troubleshooting

**Error: "dropdown: cannot find DataTable2 table X"** – Ensure the `table` name matches exactly and exists on the current page or a "/Data" subpage.
**Calculation fails** – Verify that variable names in <riskmodel> or <riskdisplay> calculations match column names in the <datatable2> `columns` attribute.
**Dropdown shows no data** – Check that the table has data rows and the `label_column` in <dropdown> matches a column name.
**Table not rendering** – Ensure the `<head>` section and data rows use correct wikitext table syntax (`!` for headers, `|` for data).