# Bang Reference

## `!add(name:string)`

Appends a new node into the context.

Example:
```xn
# Add 1 to all LcId
$("//RxPdo/Index[.="#x1600"]/..")
{
    # Add a new Entry with attribute "added" set to "true"
    !add("Entry")
    {
        attr("added", "true");
    }
};
```

## `!before(name:string)`

Appends a new node before the context.

Example:
```xn
# Add 1 to all LcId
$("//RxPdo/Index[.="#x1600"]/..")
{
    # Add a new TxPdo with attribute "added" set to "true" before the above node selection
    !before("TxPdo")
    {
        attr("added", "true");
    }
};
```

## `!after(name:string)`

Appends a new node after the context.

Example:
```xn
# Add 1 to all LcId
$("//RxPdo/Index[.="#x1600"]/..")
{
    # Add a new TxPdo with attribute "added" set to "true" after the above node selection
    !after("TxPdo")
    {
        attr("added", "true");
    }
};
```