[Questions 1 - 9 were asked of all individuals.]

Head of household (male or female)
[For the head of household]

1. What is your relationship to the head of the household?

[For persons of all ages]
[Questions 1 to 12a]

Question No. 1: What kinship or relationship do you have to the head of the household?
This question is asked to know the kinship or relationship between the head and the other members of the household.
Kinship: it is the tie that members of a particular census household have to the head. This may be based on consanguinity, affinity or custom ties, adoption, and work, among others.
Data from the first person on the questionnaire will always correspond to the head of household and should not be used to fill the data of another household member.
Mark with an "X" in the circle agreeing with the respondent's answer. If you are interviewing the head of household, mark the circle [circle 01] and do not ask this question
In cases of children who cannot answer for themselves or of any person who is not present at the time of the visit, ask this question as follows: What kinship or relationship does [Name of the person] have to Mr. (Mrs.) [head of the household]?
[p. 118]
With this question it should be kept in mind that:
Head (Circle 01): refers to a person recognized as such by the rest of the members of the home.
In the case that there is no agreement between the members, the person who has the economic responsibility should be considered as the head of household. When there are many who contribute economic responsibility, consider as head the person who contributes the most. When the home is formed by unrelated members, consider as head the oldest person in the home.
When the person recognized as head of household is absent, one who satisfies the requirements of the definition, in other words, one who is recognized as "head" of the household or who upholds any of the conditions in their absence will be considered to be head.
Spouse of the Head (Circle 02): refers to the wife or companion if the head is male or the husband or companion if the head is female. This relationship permits any type of matrimonial relation, that is to say that the pair can be married civilly, ecclesiastically, or [consensually] united. In the same household you can find more than one spouse; write them down as such.
Son (daughter) (Circle 03): refers to the children born of the marriage or the consensual union, as well as to adopted children or children raised there.
Son and daughter-in-law (Circle 04): refers to the spouse of the children of the head.
Grandchild or great-grandchild (Circle 05): Mark this circle if it concerns the children of the children of the head or the grandchildren of the head.
Father or mother of the head (Circle 06): refers to the mother or father of the head. Mark this circle, even, when it concerns the father or mother of the head who raised her or adopted her.
Mother or father-in-law (Circle0 7): refers to the father or mother of the spouse of the head.
Other relatives (Circle 08): Include siblings, brothers and sisters-in-law, godfathers, cousins, godsons and daughters; both of the head or the spouse, etc.
In the corresponding line, write down the relationship that the respondent has with the head of the household.
[p. 120]
Domestic service (Circle 09): Refers to domestic servants. These are persons working at the household being enumerated, doing domestic chores and who receive payment in cash and / or in kind for their work; examples: domestic employee, gardener, driver or chauffeur, cook, housekeeper, majordomo, among others.
Non-related (Circle 10): Any member of the household who does not belong to the categories above is included. Example: friends and guests.
[There is a sample image of the form below the text.]
Example:
When interviewing Mrs. Alicia, she states that she is the companion of Florentino, who is the head of household. Although they have been living together for several years, they have not thought about civil or by the church marriage. The answer to the question on relationship to head is marked with:
[There is a sample image of the form below the text, but no actual example was provided.]

Nuclear family.
Group of people living under the same roof, share a common life and are linked by ties of blood kinship, adoption or marriage. We consider only the blood ties to the first degree downward or upward (parents and children). The family nucleus must consist of at least two members. It is important to remember that both "household" and "family nucleus" are different definitions.
In a group there is always a head and one or more family groups (nuclei), which in turn, will have a group or nucleus leader.
In a household there can be one or more families.
Kinship and marital status, as well as their names and last names will be considered for their codification.
Notice that for household's identification, the following criteria should be followed:

[p. 126]
To encode the family nucleus we use the boxes in question 1 on the relationship to the head of household.
[There is a sample image of the form with an arrow pointing to the digit in the first box. The example is "Nucleus [1] [3]", this is, the family group number 1 in this household.]
The first digit indicates the number of the family nucleus within the household and it should be assigned on a one by one basis according to the number of groups that exist in the household.

[There is a sample image of the form with an arrow pointing to the digit in the second box. The example is "Nucleus [1] [3]". This is, a son or daughter of the head of the family group number 1.]
The second digit indicates the relationship to the primary member of the respective core.
[p. 127]
Examples of nuclear families:

[There is a sample image of the form enumerating a household whose members are Ernesto Berrocal, Aminta Berrocal, Ruth Berrocal, Julio Berrocal, Martin Berrocal, Emilia Berrocal, Pedro Berrocal, Ofelia Berrocal, Francisco Fuentes and Rodolfo Galindo.]
[p. 128]
[There is a sample image of the form enumerating a household whose members are Ernesto Berrocal, Aminta Berrocal, Ruth Berrocal, Julio Berrocal, Martin Berrocal, Emilia Berrocal, Pedro Berrocal, Ofelia Berrocal, Francisco Fuentes and Rodolfo Galindo.]
[p. 129]
Ernesto and Aminta Berrocal are married and their unmarried children: Ruth, Julio, Martin and Emilia also slept in this household.
The coding is done in the appropriate boxes for each person, in Question 1 of kinship, as follows:
[There are six explanatory pictures below the text.]
Ernesto Berrocal [1] [1] Nucleus or group
Aminta Berrocal [1] [2] Nucleus or group
Ruth [1] [3] Nucleus or group
Julio [1] [3] Nucleus or group
Martin [1] [3] Nucleus or group
Emilia [1] [3] Nucleus or group
[p. 130]
The father and mother of Mr. Berrocal slept at this household the night with a child they care for. The grandson [the child] does not form a family group or nucleus with them, as he is not their child; therefore, he has no first-degree blood ties [with the Berrocal family].
The coding is done in the appropriate boxes for each person, in Question 1 of kinship, as follows:
[There is one explanatory picture below the text.]
Pedro [2] [1] Nucleus or group
Ofelia [2] [2] Nucleus or group
Francisco [0] [0] Nucleus or group

Rodolfo Galindo, who also slept there, does not form a family group or nucleus with anyone, as he has no kinship with household members.
The coding is done in the appropriate boxes for each person, in Question 1 of kinship, as follows:
[There is one explanatory picture below the text.]
Rodolfo [0] [0] Nucleus or group