# {py:mod}`arelle.utils.validate.Facts`

```{py:module} arelle.utils.validate.Facts
```

```{autodoc2-docstring} arelle.utils.validate.Facts
:allowtitles:
```

## Module Contents

### Functions

````{list-table}
:class: autosummary longtable
:align: left

* - {py:obj}`factHasXsiNilAttribute <arelle.utils.validate.Facts.factHasXsiNilAttribute>`
  - ```{autodoc2-docstring} arelle.utils.validate.Facts.factHasXsiNilAttribute
    :summary:
    ```
* - {py:obj}`factHasPrecisionAttribute <arelle.utils.validate.Facts.factHasPrecisionAttribute>`
  - ```{autodoc2-docstring} arelle.utils.validate.Facts.factHasPrecisionAttribute
    :summary:
    ```
* - {py:obj}`isEmptyStringItemFact <arelle.utils.validate.Facts.isEmptyStringItemFact>`
  - ```{autodoc2-docstring} arelle.utils.validate.Facts.isEmptyStringItemFact
    :summary:
    ```
* - {py:obj}`isValidNonNilFact <arelle.utils.validate.Facts.isValidNonNilFact>`
  - ```{autodoc2-docstring} arelle.utils.validate.Facts.isValidNonNilFact
    :summary:
    ```
* - {py:obj}`factHasNegativeNumericValue <arelle.utils.validate.Facts.factHasNegativeNumericValue>`
  - ```{autodoc2-docstring} arelle.utils.validate.Facts.factHasNegativeNumericValue
    :summary:
    ```
* - {py:obj}`getDuplicateFactGroupsByConceptContextUnit <arelle.utils.validate.Facts.getDuplicateFactGroupsByConceptContextUnit>`
  - ```{autodoc2-docstring} arelle.utils.validate.Facts.getDuplicateFactGroupsByConceptContextUnit
    :summary:
    ```
* - {py:obj}`iterValidNonNilFactsByQname <arelle.utils.validate.Facts.iterValidNonNilFactsByQname>`
  - ```{autodoc2-docstring} arelle.utils.validate.Facts.iterValidNonNilFactsByQname
    :summary:
    ```
* - {py:obj}`hasValidNonNilFactByQname <arelle.utils.validate.Facts.hasValidNonNilFactByQname>`
  - ```{autodoc2-docstring} arelle.utils.validate.Facts.hasValidNonNilFactByQname
    :summary:
    ```
* - {py:obj}`getUsedConceptsFromFacts <arelle.utils.validate.Facts.getUsedConceptsFromFacts>`
  - ```{autodoc2-docstring} arelle.utils.validate.Facts.getUsedConceptsFromFacts
    :summary:
    ```
* - {py:obj}`hasNonNillFact <arelle.utils.validate.Facts.hasNonNillFact>`
  - ```{autodoc2-docstring} arelle.utils.validate.Facts.hasNonNillFact
    :summary:
    ```
* - {py:obj}`getNegativeFacts <arelle.utils.validate.Facts.getNegativeFacts>`
  - ```{autodoc2-docstring} arelle.utils.validate.Facts.getNegativeFacts
    :summary:
    ```
````

### Data

````{list-table}
:class: autosummary longtable
:align: left

* - {py:obj}`_ <arelle.utils.validate.Facts._>`
  - ```{autodoc2-docstring} arelle.utils.validate.Facts._
    :summary:
    ```
* - {py:obj}`XSI_NIL_ATTR <arelle.utils.validate.Facts.XSI_NIL_ATTR>`
  - ```{autodoc2-docstring} arelle.utils.validate.Facts.XSI_NIL_ATTR
    :summary:
    ```
````

### API

````{py:data} _
:canonical: arelle.utils.validate.Facts._
:type: arelle.typing.TypeGetText
:value: >
   None

```{autodoc2-docstring} arelle.utils.validate.Facts._
```

````

````{py:data} XSI_NIL_ATTR
:canonical: arelle.utils.validate.Facts.XSI_NIL_ATTR
:value: >
   '{http://www.w3.org/2001/XMLSchema-instance}nil'

```{autodoc2-docstring} arelle.utils.validate.Facts.XSI_NIL_ATTR
```

````

````{py:function} factHasXsiNilAttribute(fact: arelle.ModelInstanceObject.ModelFact) -> bool
:canonical: arelle.utils.validate.Facts.factHasXsiNilAttribute

```{autodoc2-docstring} arelle.utils.validate.Facts.factHasXsiNilAttribute
```
````

````{py:function} factHasPrecisionAttribute(fact: arelle.ModelInstanceObject.ModelFact) -> bool
:canonical: arelle.utils.validate.Facts.factHasPrecisionAttribute

```{autodoc2-docstring} arelle.utils.validate.Facts.factHasPrecisionAttribute
```
````

````{py:function} isEmptyStringItemFact(fact: arelle.ModelInstanceObject.ModelFact) -> bool
:canonical: arelle.utils.validate.Facts.isEmptyStringItemFact

```{autodoc2-docstring} arelle.utils.validate.Facts.isEmptyStringItemFact
```
````

````{py:function} isValidNonNilFact(fact: arelle.ModelInstanceObject.ModelFact) -> bool
:canonical: arelle.utils.validate.Facts.isValidNonNilFact

```{autodoc2-docstring} arelle.utils.validate.Facts.isValidNonNilFact
```
````

````{py:function} factHasNegativeNumericValue(fact: arelle.ModelInstanceObject.ModelFact) -> bool
:canonical: arelle.utils.validate.Facts.factHasNegativeNumericValue

```{autodoc2-docstring} arelle.utils.validate.Facts.factHasNegativeNumericValue
```
````

````{py:function} getDuplicateFactGroupsByConceptContextUnit(facts: collections.abc.Iterable[arelle.ModelInstanceObject.ModelFact]) -> dict[object, list[arelle.ModelInstanceObject.ModelFact]]
:canonical: arelle.utils.validate.Facts.getDuplicateFactGroupsByConceptContextUnit

```{autodoc2-docstring} arelle.utils.validate.Facts.getDuplicateFactGroupsByConceptContextUnit
```
````

````{py:function} iterValidNonNilFactsByQname(modelXbrl: arelle.ModelXbrl.ModelXbrl, qname: arelle.ModelValue.QName) -> collections.abc.Iterable[arelle.ModelInstanceObject.ModelFact]
:canonical: arelle.utils.validate.Facts.iterValidNonNilFactsByQname

```{autodoc2-docstring} arelle.utils.validate.Facts.iterValidNonNilFactsByQname
```
````

````{py:function} hasValidNonNilFactByQname(modelXbrl: arelle.ModelXbrl.ModelXbrl, qname: arelle.ModelValue.QName) -> bool
:canonical: arelle.utils.validate.Facts.hasValidNonNilFactByQname

```{autodoc2-docstring} arelle.utils.validate.Facts.hasValidNonNilFactByQname
```
````

````{py:function} getUsedConceptsFromFacts(modelXbrl: arelle.ModelXbrl.ModelXbrl) -> set[arelle.ModelDtsObject.ModelConcept]
:canonical: arelle.utils.validate.Facts.getUsedConceptsFromFacts

```{autodoc2-docstring} arelle.utils.validate.Facts.getUsedConceptsFromFacts
```
````

````{py:function} hasNonNillFact(modelXbrl: arelle.ModelXbrl.ModelXbrl, conceptKey: typing.Union[arelle.ModelValue.QName, str]) -> bool
:canonical: arelle.utils.validate.Facts.hasNonNillFact

```{autodoc2-docstring} arelle.utils.validate.Facts.hasNonNillFact
```
````

````{py:function} getNegativeFacts(modelXbrl: arelle.ModelXbrl.ModelXbrl, conceptKey: typing.Union[arelle.ModelValue.QName, str]) -> list[arelle.ModelInstanceObject.ModelFact]
:canonical: arelle.utils.validate.Facts.getNegativeFacts

```{autodoc2-docstring} arelle.utils.validate.Facts.getNegativeFacts
```
````