---
title: Scripting
slug: reference/scripting
docTags: 
createdAt: 2025-09-05T13:15:46.537Z
---

## Tengo scripting language

A calculation script makes use of a scripting language, called Tengo.

Tengo is a scripting language written in Go, with a Go-like syntax. Below, you’ll find some resources to help you get started:

- [Basic syntax overview](docId\:BxvTdfxvmSChcTirSq55h)
- [Interactive playground](https://tengolang.com/)
- [Full documentation](https://github.com/d5/tengo/tree/master/docs)

## Input data reference(s) via alias

To access the data of an input data reference, one can use the according alias for the input data reference given in the calculation settings. The alias contains the following properties:

- `Value`: the value of the data reference
- `Timestamp`: the timestamp of the data reference
- `Tags`: the tags of the data reference
- `Measurement`: the measurement name of the data reference
- `Datatype`: the datatype of the data reference

:::hint{type="info"}
The properties are case sensitive, so e.g. `value` will not work.
:::

### Example

This example uses the `Value` property of an alias `_A` to access the value of an input data reference and multiplies that value by 2.

:::CodeblockTabs
Tengo

```go
return _A.Value * 2
```
:::

## Calculation context helper functions

- **set\_tag**: `set_tag(tag, value)` sets a tag in the result
- **set\_status**: `set_status(status)` sets the status of the result
- **set\_timestamp**: `set_timestamp(timestamp)` overrides the timestamp of the result. The argument has to be a `times` value.

## Accessing Metadata

You can access metadata in different contexts, including metadata for the calculation itself or metadata for inputs. These inputs can be either **asset properties** or **measurements**. Additionally, if the input is an asset property, you can also access the metadata of the **associated asset**.

### Accessing Metadata of the Calculation Itself

To access the metadata of the calculation itself, use:

:::CodeblockTabs
Tengo

```go
factry.get_metadata("<metadata-key>")
```
:::

Replace `<metadata-key>` with the key you need.

### Accessing Metadata of Inputs

Inputs can be either **measurements** or **asset properties**, and the metadata can be accessed as follows:

**Accessing Metadata of Measurements or Asset Properties**

To access a specific metadata key of an input (either a measurement or asset property):

:::CodeblockTabs
Tengo

```go
factry.get_input_metadata("<input-alias>", "<metadata-key>")
```
:::

Replace `<input-alias>` with the alias of the input data and `<metadata-key>` with the key you need.
To access all metadata of an input:

:::CodeblockTabs
Tengo

```go
metadata := factry.get_input_metadata("<input-alias>")
```
:::

You can then retrieve specific keys:

:::CodeblockTabs
Tengo

```go
metadata["<metadata-key>"]
```
:::

**Accessing Metadata of the Asset (When Input is an Asset Property)**

If the input is an **asset property**, you can also access the metadata of the **associated asset**:

To access a specific metadata key of the associated asset:

:::CodeblockTabs
Tengo

```go
factry.get_input_asset_metadata("<input-alias>", "<metadata-key>")
```
:::

To access all metadata of the associated asset:

:::CodeblockTabs
Tengo

```go
metadata := factry.get_input_asset_metadata("<input-alias>")
```
:::

Retrieve a specific key as needed:

:::CodeblockTabs
Tengo

```go
metadata["<metadata-key>"]
```
:::

## Standard Tengo libraries

The following is a list of standard Tengo libraries that are always available and do not need to be imported in your script. For example, you can use `math` directly without assigning it using `math := import("math")`.

### math

Defines some mathematic constants and functions.

[More info](docId\:cyyQqUn596xk5Fw2tgS5q)

### times

Defines some basic time based constants and functions.

[More info](docId\:E31dwpd2IfD_VOVDpLb32)

- **time\_weekday**: `times.time_weekday(t time)` returns an integer that represents the day of the week of a given timestamp. The numeric representation of weekdays start from 0 with Sunday and end at 6 with Saturday.

**Example:**

:::CodeblockTabs
Tengo

```go
tz := "Europe/Brussels"
ts := times.to_location(_A.Timestamp, tz)
diw := times.time_weekday(ts) // numeric representation of the day of week
hid := times.time_hour(ts) // hour of the day

if diw >= 1.0 && diw <= 5.0 && hid >= 5.0 && hid < 13.0 {
  return 1.0
}

if diw >= 1.0 && diw <= 5.0 && hid >= 13.0 && hid < 21.0 {
  return 2.0
}

if diw >= 1.0 && diw <= 5.0 && hid >= 21.0 && hid < 5.0 {
   return 3.0
}

if (diw == 0.0 || diw == 6.0) && hid >= 5.0 && hid < 17.0 {
  return 4.0
}

if (diw == 0.0 || diw == 6.0) && hid >= 17.0 && hid < 5.0 {
  return 4.0
}
```
:::

### rand

Defines functions to generate random values.

[More info](docId\:F3LjcPUv25SnHSav7BzB4)

### text

Defines string manipulation and formatting functions.

[More info](docId\:qqnIa8O5bNQighH_v8BzE)

### enum

Defines some functions to work with enumerables.

[More info](docId\:uxOOZS_16Dd-vnrAyrZnJ)

### json

Defines functions to encode and decode JSON.

[More info](docId\:CUtDwKLnMEzw77VNb1Pby)

### hex

Defines functions for hexadecimal encoding and decoding.

[More info](docId\:UIwlnhYUJz-Dwn8xZ61OH)

### base64

Defines functions for base64 encoding and decoding.

[More info](docId\:MmuuGkIumlGOL2iCFX0-z)

## Factry Tengo libraries

We’ve added some custom libraries on top of the existing libraries to allow for more versatile scripts.

### local

Local allows to save variables in a local context specific to a particular calculation. Only this calculation script can store/retrieve the value across all script executions. The key `Context` is reserved for the [calculation context](docId:9vedQPMTtHzwUy1cLKaVh) and can’t be written with `local.set`. Reading it is allowed and returns the calculation context, the same value as `local.getContext()`.

An overview of the available functions:

**get**: `local.get(key, [defaultValue])` retrieves a value from the local context by its key, with an optional default value to be used when the key is absent. A key that was explicitly stored as `undefined` returns `undefined`, not the default.

**set**: `local.set(key, value)` sets a value in the local context by its key.

**Example:**

This example retrieves a previously set value from the local context. If the value does not exist, a default value 0.0 is used. After adding 1.0 to the result, the value is set again in the local context and returned as output by the script.

:::CodeblockTabs
Tengo

```go
previous := float(local.get("previous"),0.0)
result := previous + 1.0
local.set("previous", result)
return result
```
:::

### global

Global allows to save variables in a global context, scoped per organization, accessible to all calculation scripts. Any calculation script can store/retrieve the value across all scripts executions. An overview of the available functions:

**get**: `global.get(key, [defaultValue])` retrieves a value from the global context by its key, with an optional default value to be used when the key is absent. A key that was explicitly stored as `undefined` returns `undefined`, not the default.

**set**: `global.set(key, value)` sets a value in the global context by its key.

### util

Util provides custom functions for basic operations which are not available or incomplete in the standard Tengo library.

**is\_equal**: checks whether 2 objects are equal, providers better handling of undefined values

**Examples**

Simple boolean comparison

:::CodeblockTabs
Tengo

```go
if is_equal(_A.Value, true) {
  return _B.Value
}

return _C.Value
```
:::

Comparing numeric types, in this example \_A.Value is of type float

:::CodeblockTabs
Tengo

```go
return is_equal(_A.Value, 12)
```
:::

### units

Units provides simple unit conversion. Its main datatype is the `Value`, which represents a number with a given unit.
When a `Value` is returned from a script, it is automatically converted to the bare number.
All functions that accept the name of a unit accept the the shorthand of the unit, the singular or plural form of the unit name, and varying spellings of the unit name, eg. `m`, `meter`, `meters`, `metre`, `metres`.

**convert**:

- `units.convert(input, unit)` converts the input into a `Value`. If `input` is a number, a new `Value` is returned with the given unit. If the input is already a `Value`, the input is converted into the given unit.
  Conversions can be done between different magnitudes, e.g. `meter` to `kilometer`, and between different systems, e.g. Celsius to Fahrenheit, or meters to feet.
- `units.convert(input, from, to)` converts the given number from one unit into another, returning a number.

**float**:` units.float(value)` returns the number stored in the `Value`.

**find**: `units.find(unit)` returns the unit object for the given unit. The unit object can be used to add units to numbers, or to convert between units.

**Supported units**

Pressure

| **Unit**                    | **Names**                                                                 |
| --------------------------- | ------------------------------------------------------------------------- |
| attopascal                  | attopascal,aPa,attopascals                                                |
| femtopascal                 | femtopascal,fPa,femtopascals                                              |
| picopascal                  | picopascal,pPa,picopascals                                                |
| nanopascal                  | nanopascal,nPa,nanopascals                                                |
| micropascal                 | micropascal,μPa,micropascals                                              |
| millipascal                 | millipascal,mPa,millipascals                                              |
| centipascal                 | centipascal,cPa,centipascals                                              |
| decipascal                  | decipascal,dPa,decipascals                                                |
| pascal                      | pascal,Pa,pascals                                                         |
| decapascal                  | decapascal,daPa,decapascals                                               |
| hectopascal                 | hectopascal,hPa,hectopascals                                              |
| kilopascal                  | kilopascal,kPa,kilopascals                                                |
| megapascal                  | megapascal,MPa,megapascals                                                |
| gigapascal                  | gigapascal,GPa,gigapascals                                                |
| terapascal                  | terapascal,TPa,terapascals                                                |
| petapascal                  | petapascal,PPa,petapascals                                                |
| exapascal                   | exapascal,EPa,exapascals                                                  |
| microbar                    | microbar,μbar,microbars                                                   |
| millibar                    | millibar,mbar,millibars                                                   |
| centibar                    | centibar,cbar,centibars                                                   |
| bar                         | bar,bars                                                                  |
| millimeter of Mercury       | millimeter of Mercury,mmmHg,millimeter of Mercurys                        |
| centimeter of Mercury       | centimeter of Mercury,cmmHg,centimeter of Mercurys                        |
| meter of Mercury            | meter of Mercury,mmHg,meters of Mercury,meters of Mercury                 |
| inch of Mercury             | inch of Mercury,inHg,inch of Mercurys                                     |
| millimeter of Water Column  | millimeter of Water Column,mmmH2O,millimeter of Water Columns             |
| centimeter of Water Column  | centimeter of Water Column,cmmH2O,centimeter of Water Columns             |
| meter of Water Column       | meter of Water Column,mmH2O,meters of Water Column,meters of Water Column |
| inch of Water Column        | inch of Water Column,inH2O,inch of Water Columns                          |
| newton per square meter     | newton per square meter,N/m²,newton per square meters                     |
| pound-force per square inch | pound-force per square inch,psi,pound-force per square inchs              |
| standard atmosphere         | standard atmosphere,atm,standard atmospheres,standard atmospheres         |
| technical atmosphere        | technical atmosphere,at,technical atmospheres,technical atmospheres       |
| torr                        | torr,Torr,torrs                                                           |
| barye                       | barye,Ba,baryes,baryes                                                    |

Time

| **Unit**    | **Names**                    |
| ----------- | ---------------------------- |
| attosecond  | attosecond,as,attoseconds    |
| femtosecond | femtosecond,fs,femtoseconds  |
| picosecond  | picosecond,ps,picoseconds    |
| nanosecond  | nanosecond,ns,nanoseconds    |
| microsecond | microsecond,μs,microseconds  |
| millisecond | millisecond,ms,milliseconds  |
| centisecond | centisecond,cs,centiseconds  |
| decisecond  | decisecond,ds,deciseconds    |
| second      | second,s,seconds             |
| decasecond  | decasecond,das,decaseconds   |
| hectosecond | hectosecond,hs,hectoseconds  |
| kilosecond  | kilosecond,ks,kiloseconds    |
| megasecond  | megasecond,Ms,megaseconds    |
| gigasecond  | gigasecond,Gs,gigaseconds    |
| terasecond  | terasecond,Ts,teraseconds    |
| petasecond  | petasecond,Ps,petaseconds    |
| exasecond   | exasecond,Es,exaseconds      |
| minute      | minute,min,minutes           |
| hour        | hour,hr,hours                |
| day         | day,d,days                   |
| fortnight   | fortnight,fortnights         |
| month       | month,months                 |
| year        | year,yr,years                |
| decade      | decade,decades               |
| score       | score,scores                 |
| century     | century,centurys             |
| millennium  | millennium,millenniums       |
| planck time | planck time,𝑡ₚ,planck times |

Bits/Bytes

| **Unit** | **Names**           |
| -------- | ------------------- |
| bit      | bit,b,bits          |
| kilobit  | kilobit,kb,kilobits |
| megabit  | megabit,Mb,megabits |
| gigabit  | gigabit,Gb,gigabits |
| terabit  | terabit,Tb,terabits |
| petabit  | petabit,Pb,petabits |
| exabit   | exabit,Eb,exabit    |

| **Unit**  | **Names**              |
| --------- | ---------------------- |
| nibble    | nibble,nibbles         |
| byte      | byte,B,bytes           |
| kilobyte  | kilobyte,KB,kilobytes  |
| kibibyte  | kibibyte,KiB,kibibytes |
| megabyte  | megabyte,MB,megabytes  |
| mebibyte  | mebibyte,MiB,mebibytes |
| gigabyte  | gigabyte,GB,gigabytes  |
| gibibyte  | gibibyte,GiB,gibibytes |
| terabyte  | terabyte,TB,terabytes  |
| tebibyte  | tebibyte,TiB,tebibytes |
| petabyte  | petabyte,PB,petabytes  |
| pebibyte  | pebibyte,PiB,pebibytes |
| exabyte   | exabyte,exabytes       |
| exbibyte  | exbibyte,EiB,exbibytes |
| zettabyte | zettabyte,zettabytes   |
| zebibyte  | zebibyte,ZiB,zebibytes |
| yottabyte | yottabyte,yottabytes   |
| yobibyte  | yobibyte,YiB,yobibytes |

Energy

| **Unit**      | **Names**                        |
| ------------- | -------------------------------- |
| attojoule     | attojoule,aJ,attojoules          |
| femtojoule    | femtojoule,fJ,femtojoules        |
| picojoule     | picojoule,pJ,picojoules          |
| nanojoule     | nanojoule,nJ,nanojoules          |
| microjoule    | microjoule,μJ,microjoules        |
| millijoule    | millijoule,mJ,millijoules        |
| joule         | joule,J,joules                   |
| kilojoule     | kilojoule,kJ,kilojoules          |
| megajoule     | megajoule,MJ,megajoules          |
| gigajoule     | gigajoule,GJ,gigajoules          |
| terajoule     | terajoule,TJ,terajoules          |
| petajoule     | petajoule,PJ,petajoules          |
| exajoule      | exajoule,EJ,exajoules            |
| zettajoule    | zettajoule,ZJ,zettajoules        |
| yottajoule    | yottajoule,YJ,yottajoules        |
| calorie       | calorie,cal,calories             |
| electronvolt  | electronvolt,eV,electronvolts    |
| watt-hour     | watt-hour,Wh,watt-hours          |
| kilowatt-hour | kilowatt-hour,kWh,kilowatt-hours |
| megawatt-hour | megawatt-hour,MWh,megawatt-hours |
| gigawatt-hour | gigawatt-hour,GWh,gigawatt-hours |
| terawatt-hour | terawatt-hour,TWh,terawatt-hours |
| petawatt-hour | petawatt-hour,PWh,petawatt-hours |

Power

| **Unit**  | **Names**               |
| --------- | ----------------------- |
| watt      | watt,W,watts            |
| kilowatt  | kilowatt,kW,kilowatts   |
| megawatt  | megawatt,MW,megawatts   |
| gigawatt  | gigawatt,GW,gigawatts   |
| terawatt  | terawatt,TW,terawatts   |
| petawatt  | petawatt,PW,petawatts   |
| exawatt   | exawatt,EW,exawatts     |
| zettawatt | zettawatt,ZW,zettawatts |
| yottawatt | yottawatt,YW,yottawatts |

Temperature

| **Unit**   | **Names**    |
| ---------- | ------------ |
| celsius    | celsius,C    |
| fahrenheit | fahrenheit,F |
| kelvin     | kelvin,K     |

Volume

| **Unit**              | **Names**                                    |
| --------------------- | -------------------------------------------- |
| attoliter             | attoliter,al,attolitre,attoliters            |
| femtoliter            | femtoliter,fl,femtolitre,femtoliters         |
| picoliter             | picoliter,pl,picolitre,picoliters            |
| nanoliter             | nanoliter,nl,nanolitre,nanoliters            |
| microliter            | microliter,μl,microlitre,microliters         |
| milliliter            | milliliter,ml,millilitre,milliliters         |
| centiliter            | centiliter,cl,centilitre,centiliters         |
| deciliter             | deciliter,dl,decilitre,deciliters            |
| liter                 | liter,l,litre,liters                         |
| decaliter             | decaliter,dal,decalitre,decaliters           |
| hectoliter            | hectoliter,hl,hectolitre,hectoliters         |
| kiloliter             | kiloliter,kl,kilolitre,kiloliters            |
| megaliter             | megaliter,Ml,megalitre,megaliters            |
| gigaliter             | gigaliter,Gl,gigalitre,gigaliters            |
| teraliter             | teraliter,Tl,teralitre,teraliters            |
| petaliter             | petaliter,Pl,petalitre,petaliters            |
| exaliter              | exaliter,El,exalitre,exaliters               |
| customary fluid ounce | customary fluid ounce,customary fluid ounces |
| fluid ounce           | fluid ounce,fl oz,floz,fluid ounces          |
| fluid pint            | fluid pint,fl pt,fluid pints                 |
| fluid quart           | fluid quart,fl qt,fluid quarts               |
| fluid gallon          | fluid gallon,fluid gallons                   |
| pint                  | pint,pt,pints                                |
| quart                 | quart,qt,quarts                              |
| gallon                | gallon,gal,gallons                           |

Length

| **Unit**      | **Names**                            |
| ------------- | ------------------------------------ |
| attometer     | attometer,am,attometre,attometers    |
| femtometer    | femtometer,fm,femtometre,femtometers |
| picometer     | picometer,pm,picometre,picometers    |
| nanometer     | nanometer,nm,nanometre,nanometers    |
| micrometer    | micrometer,μm,micrometre,micrometers |
| millimeter    | millimeter,mm,millimetre,millimeters |
| centimeter    | centimeter,cm,centimetre,centimeters |
| decimeter     | decimeter,dm,decimetre,decimeters    |
| meter         | meter,m,metre,meters                 |
| decameter     | decameter,dam,decametre,decameters   |
| hectometer    | hectometer,hm,hectometre,hectometers |
| kilometer     | kilometer,km,kilometre,kilometers    |
| megameter     | megameter,Mm,megametre,megameters    |
| gigameter     | gigameter,Gm,gigametre,gigameters    |
| terameter     | terameter,Tm,terametre,terameters    |
| petameter     | petameter,Pm,petametre,petameters    |
| exameter      | exameter,Em,exametre,exameters       |
| angstrom      | angstrom,Å,angstroms,angstroms       |
| inch          | inch,in,inches,inches                |
| foot          | foot,ft,feet,feet                    |
| yard          | yard,yd,yards                        |
| mile          | mile,mi,miles                        |
| nautical mile | nautical mile,nmi                    |
| furlong       | furlong,fur,furlongs                 |
| league        | league,lea,leagues                   |

Mass

| **Unit**  | **Names**               |
| --------- | ----------------------- |
| attogram  | attogram,ag,attograms   |
| femtogram | femtogram,fg,femtograms |
| picogram  | picogram,pg,picograms   |
| nanogram  | nanogram,ng,nanograms   |
| microgram | microgram,μg,micrograms |
| milligram | milligram,mg,milligrams |
| centigram | centigram,cg,centigrams |
| decigram  | decigram,dg,decigrams   |
| gram      | gram,g,grams            |
| decagram  | decagram,dag,decagrams  |
| hectogram | hectogram,hg,hectograms |
| kilogram  | kilogram,kg,kilograms   |
| megagram  | megagram,Mg,megagrams   |
| gigagram  | gigagram,Gg,gigagrams   |
| teragram  | teragram,Tg,teragrams   |
| petagram  | petagram,Pg,petagrams   |
| exagram   | exagram,Eg,exagrams     |
| drachm    | drachm,dr,drachms       |
| grain     | grain,gr,grains         |
| ounce     | ounce,oz,ounces         |
| pound     | pound,lb,pounds         |
| slug      | slug,slugs              |
| stone     | stone,st,stones         |
| ton       | ton,t,tons              |

**Examples**

Unit conversion

:::CodeblockTabs
Tengo

```go
// Convert 1000 meters to kilometers
// 1. convert the number 1000 to a Value with unit "m"
meters := units.convert(1000, "m")
// 2. convert the Value to kilometers
kilometers := units.convert(meters, "km")
// 3. return the number stored in the Value
// note that this conversion is not necessary, as the result is automatically converted to a number
kilometersFloat := units.float(kilometers)
return kilometersFloat
```
:::

Unit conversion with find

:::CodeblockTabs
Tengo

```go
// Convert 20 degrees Celsius to Kelvin, and convert 30 degrees Celsius to Fahrenheit
celsius := units.find("C")
kelvin := units.find("K")
fahrenheit := units.find("F")
twentyC := celsius(20)
thirtyC := celsius(30)

twentyK := units.convert(twentyC, kelvin)
thirtyF := units.convert(thirtyC, fahrenheit)
return [units.float(twentyK), units.float(thirtyF)]
```
:::

Unit conversion with from and to

:::CodeblockTabs
Tengo

```go
// Convert 1000 meters to kilometers
// 1. convert the number 1000 from "m" to "km"
kilometers := units.convert(1000, "metre", "kilometer")
// 2. return the number
return kilometers
```
:::

### if97

IF97 provides functions for calculating thermodynamic properties of steam and water according to the [IAPWS IF97](http://www.iapws.org/relguide/IF97-Rev.html) specification. This module uses names for thermodynamic quantities as defined on page 3 of the [specification PDF](http://www.iapws.org/relguide/IF97-Rev.pdf).

All IF97 functions take either a regular number or a `units.Value` unit-aware value as input. Units will be converted where needed. Most return a `units.Value`, but the dimensionless ones return a plain number: `prandtl`, `satLiqPrandtl`, `satVaporPrandtl`, `specificEnthalpyQuality`, `specificInternalEnergyQuality`, `specificEntropyQuality`, `massDensityQuality` and `specificVolumeQuality`.

**if97 functions**

**massDensity**: `if97.massDensity(temp, pressure)` returns the mass density (`kg/m^3`) as a function of temperature (`K`) and pressure (`Pa`)
**specificEnthalpy**: `if97.specificEnthalpy(temp, pressure)` returns the specific enthalpy (`J/kg`) as a function of temperature (`K`) and pressure (`Pa`)
**specificEntropy**: `if97.specificEntropy(temp, pressure)` returns the specific entropy (`J/kg/K`) as a function of temperature (`K`) and pressure (`Pa`)
**specificInternalEnergy**: `if97.specificInternalEnergy(temp, pressure)` returns the specific internal energy (`J/kg`) as a function of temperature (`K`) and pressure (`Pa`)
**isobaricHeatCap**: `if97.isobaricHeatCap(temp, pressure)` returns the mass constant-pressure heat capacity (`J/kg/K`) as a function of temperature (`K`) and pressure (`Pa`)
**isochoricHeatCap**: `if97.isochoricHeatCap(temp, pressure)` returns the mass constant-volume heat capacity (`J/kg/K`) as a function of temperature (`K`) and pressure (`Pa`)
**speedSound**: `if97.speedSound(temp, pressure)` returns the speed of sound (`m/s`) as a function of temperature (`K`) and pressure (`Pa`)
**derivMassDensityPressure**: `if97.derivMassDensityPressure(temp, pressure)` returns `(d(rho)/d(p))T` (`kg/m³/Pa`) as a function of temperature (`K`) and pressure (`Pa`)
**viscosity**: `if97.viscosity(temp, pressure)` returns the viscosity (`Pa-s`) as a function of temperature (`K`) and pressure (`Pa`)
**thermalConductivity**: `if97.thermalConductivity(temp, pressure)` returns the thermal conductivity (`W/m-K`) as a function of temperature (`K`) and pressure (`Pa`)
**prandtl**: `if97.prandtl(temp, pressure)` returns the Prandtl number (`dimensionless`) as a function of temperature (`K`) and pressure (`Pa`)
**satLiquidMassDensity**: `if97.satLiquidMassDensity(pressure)` returns the saturated liquid mass density (`kg/m^3`) as a function of pressure (`Pa`)
**satVaporMassDensity**: `if97.satVaporMassDensity(pressure)` returns the saturated vapor mass density (`kg/m^3`) as a function of pressure (`Pa`)
**satLiquidSpecificEnthalpy**: `if97.satLiquidSpecificEnthalpy(pressure)` returns the saturated liquid specific enthalpy (`J/kg`) as a function of pressure (`Pa`)
**satVaporSpecificEnthalpy**: `if97.satVaporSpecificEnthalpy(pressure)` returns the saturated vapor specific enthalpy (`J/kg`) as a function of pressure (`Pa`)
**satLiquidSpecificEntropy**: `if97.satLiquidSpecificEntropy(pressure)` returns the saturated liquid specific entropy (`J/kg/K`) as a function of pressure (`Pa`)
**satVaporSpecificEntropy**: `if97.satVaporSpecificEntropy(pressure)` returns the saturated vapor specific entropy (`J/kg/K`) as a function of pressure (`Pa`)
**satLiquidMassInternalEnergy**: `if97.satLiquidMassInternalEnergy(pressure)` returns the saturated liquid mass internal energy (`J/kg`) as a function of pressure (`Pa`)
**satVaporMassInternalEnergy**: `if97.satVaporMassInternalEnergy(pressure)` returns the saturated vapor mass internal energy (`J/kg`) as a function of pressure (`Pa`)
**satLiquidIsobaricHeatCap**: `if97.satLiquidIsobaricHeatCap(pressure)` returns the saturated liquid isobaric heat capacity (`J/kg/K`) as a function of pressure (`Pa`)
**satVaporIsobaricHeatCap**: `if97.satVaporIsobaricHeatCap(pressure)` returns the saturated vapor isobaric heat capacity (`J/kg/K`) as a function of pressure (`Pa`)
**satLiquidIsochoricHeatCap**: `if97.satLiquidIsochoricHeatCap(pressure)` returns the saturated liquid isochoric heat capacity (`J/kg/K`) as a function of pressure (`Pa`)
**satVaporIsochoricHeatCap**: `if97.satVaporIsochoricHeatCap(pressure)` returns the saturated vapor isochoric heat capacity (`J/kg/K`) as a function of pressure (`Pa`)
**satLiquidSpeedSound**: `if97.satLiquidSpeedSound(pressure)` returns the saturated liquid speed of sound (`m/s`) as a function of pressure (`Pa`)
**satVaporSpeedSound**: `if97.satVaporSpeedSound(pressure)` returns the saturated vapor speed of sound (`m/s`) as a function of pressure (`Pa`)
**satLiquidViscosity**: `if97.satLiquidViscosity(pressure)` returns the saturated liquid viscosity (`Pa-s`) as a function of pressure (`Pa`)
**satVaporViscosity**: `if97.satVaporViscosity(pressure)` returns the saturated vapor viscosity (`Pa-s`) as a function of pressure (`Pa`)
**satLiquidThermalCond**: `if97.satLiquidThermalCond(pressure)` returns the saturated liquid thermal conductivity (`W/m-K`) as a function of pressure (`Pa`)
**satVaporThermalCond**: `if97.satVaporThermalCond(pressure)` returns the saturated vapor thermal conductivity (`W/m-K`) as a function of pressure (`Pa`)
**satLiqPrandtl**: `if97.satLiqPrandtl(pressure)` returns the saturated liquid Prandtl number (`dimensionless`) as a function of pressure (`Pa`)
**satVaporPrandtl**: `if97.satVaporPrandtl(pressure)` returns the saturated vapor Prandtl number (`dimensionless`) as a function of pressure (`Pa`)
**satTemp**: `if97.satTemp(pressure)` returns the saturation temperature (`K`) as a function of pressure (`Pa`)
**satPressure**: `if97.satPressure(temp)` returns the saturation pressure (`Pa`) as a function of temperature (`K`)
**surfaceTension**: `if97.surfaceTension(temp)` returns the surface tension (`N/m`) as a function of temperature (`K`)
**backwardEnthalpyTemp**: `if97.backwardEnthalpyTemp(pressure, specific_enthalpy)` returns the temperature (`K`) as a function of pressure (`Pa`) and specific enthalpy (`J/kg`)
**backwardEnthalpyMassDensity**: `if97.backwardEnthalpyMassDensity(pressure, specific_enthalpy)` returns the mass density (`kg/m^3`) as a function of pressure (`Pa`) and specific enthalpy (`J/kg`)
**backwardEntropyTemp**: `if97.backwardEntropyTemp(pressure, specific_entropy)` returns the temperature (`K`) as a function of pressure (`Pa`) and specific entropy (`J/kg/K`)
**backwardEntropyMassDensity**: `if97.backwardEntropyMassDensity(pressure, specific_entropy)` returns the mass density (`kg/m^3`) as a function of pressure (`Pa`) and specific entropy (`J/kg/K`)
**backwardPressure**: `if97.backwardPressure(specific_enthalpy, specific_entropy)` returns the pressure (`Pa`) as a function of specific enthalpy (`J/kg`) and specific entropy (`J/kg/K`)
**backwardTemp**: `if97.backwardTemp(specific_enthalpy, specific_entropy)` returns the temperature (`K`) as a function of specific enthalpy (`J/kg`) and specific entropy (`J/kg/K`)
**backwardEntropyEnthalpy**: `if97.backwardEntropyEnthalpy(pressure, specific_entropy)` returns the specific enthalpy (`J/kg`) as a function of pressure (`Pa`) and specific entropy (`J/kg/K`)
**backwardEnthalpyEntropy**: `if97.backwardEnthalpyEntropy(pressure, specific_enthalpy)` returns the specific entropy (`J/kg/K`) as a function of pressure (`Pa`) and specific enthalpy (`J/kg`)
**qualitySpecificEnthalpy**: `if97.qualitySpecificEnthalpy(pressure, vapor_quality)` returns the specific enthalpy (`J/kg`) as a function of pressure (`Pa`) and vapor quality (`%`)
**qualitySpecificInternalEnergy**: `if97.qualitySpecificInternalEnergy(pressure, vapor_quality)` returns the specific internal energy (`J/kg`) as a function of pressure (`Pa`) and vapor quality (`%`)
**qualitySpecificEntropy**: `if97.qualitySpecificEntropy(pressure, vapor_quality)` returns the specific entropy (`J/kg/K`) as a function of pressure (`Pa`) and vapor quality (`%`)
**qualitySpecificVolume**: `if97.qualitySpecificVolume(pressure, vapor_quality)` returns the specific volume (`m^3`) as a function of pressure (`Pa`) and vapor quality (`%`)
**qualityMassDensity**: `if97.qualityMassDensity(pressure, vapor_quality)` returns the mass density (`kg/m^3`) as a function of pressure (`Pa`) and vapor quality (`%`)
**specificEnthalpyQuality**: `if97.specificEnthalpyQuality(pressure, specific_enthalpy)` returns the vapor quality (`%`) as a function of pressure (`Pa`) and specific enthalpy (`J/kg`)
**specificInternalEnergyQuality**: `if97.specificInternalEnergyQuality(pressure, specific_internal_energy)` returns the vapor quality (`%`) as a function of pressure (`Pa`) and specific internal energy (`J/kg`)
**specificEntropyQuality**: `if97.specificEntropyQuality(pressure, specific_entropy)` returns the vapor quality (`%`) as a function of pressure (`Pa`) and specific entropy (`J/kg/K`)
**massDensityQuality**: `if97.massDensityQuality(pressure, mass_density)` returns the vapor quality (`%`) as a function of pressure (`Pa`) and mass density (`kg/m^3`)
**specificVolumeQuality**: `if97.specificVolumeQuality(pressure, specific_volume)` returns the vapor quality (`%`) as a function of pressure (`Pa`) and specific volume (`m^3`)